diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 9a3a2f3..e6490ae 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -63,6 +63,8 @@
         # The value doesn't matter as long as it's > 2.087
         FRONTEND: 2.093.0
       run: |
+        dub build --compiler=${{ env.DC }}
+        dub run   --compiler=${{ env.DC }} --single test/issue_2051_running_unittests_from_dub_single_file_packages_fails.d
         ./scripts/ci/travis.sh
 
     - name: '[Windows] Test'
@@ -72,3 +74,4 @@
       run: |
         dub build --compiler=${{ env.DC }}
         dub test  --compiler=${{ env.DC }}
+        dub run   --compiler=${{ env.DC }} --single test\issue_2051_running_unittests_from_dub_single_file_packages_fails.d
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index f2b5a9d..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,114 +0,0 @@
-language: d
-dist: bionic
-
-addons:
-  apt:
-    packages:
-      - libevent-dev
-
-script:
-  - ./scripts/ci/travis.sh
-
-jobs:
-  allow_failures:
-    - d: gdc
-  include:
-    - stage: test
-      d: dmd-2.093.0
-      env: [FRONTEND=2.093, COVERAGE=true]
-    - d: dmd-2.089.1,dub
-      env: [FRONTEND=2.089]
-    - d: dmd-2.083.1,dub
-      env: [FRONTEND=2.083]
-    - d: ldc-1.22.0
-      env: [FRONTEND=2.092]
-    - d: ldc-1.20.0,dub
-      env: [FRONTEND=2.090]
-    - stage: deploy
-      d: ldc-1.22.0,dub
-      os: osx
-      addons:
-        homebrew:
-          packages:
-            - gnu-tar
-          update: true
-      script: echo "Deploying to GitHub releases ..." && ./scripts/ci/release.sh
-      deploy:
-        - provider: releases
-          file_glob: true
-          file: bin/dub-*.tar.gz
-          skip_cleanup: true
-          api_key: $GH_REPO_TOKEN
-          on:
-            tags: true
-    - d: ldc-1.22.0,dub
-      script: echo "Deploying to GitHub releases ..." && ./scripts/ci/release.sh
-      env: [ARCH=32]
-      addons:
-        apt:
-          packages:
-          - g++-multilib
-          - libcurl4-openssl-dev:i386
-      deploy:
-        - provider: releases
-          file_glob: true
-          file: bin/dub-*.tar.gz
-          skip_cleanup: true
-          api_key: $GH_REPO_TOKEN
-          on:
-            tags: true
-    - d: ldc-1.22.0,dub
-      script: echo "Deploying to GitHub releases ..." && ./scripts/ci/release.sh
-      deploy:
-        - provider: releases
-          file_glob: true
-          file: bin/dub-*.tar.gz
-          skip_cleanup: true
-          api_key: $GH_REPO_TOKEN
-          on:
-            tags: true
-    - d: ldc-1.22.0,dub
-      script: echo "Deploying to GitHub releases (win32) ..." && ./scripts/ci/release-windows.sh
-      addons:
-        apt:
-          packages:
-            - p7zip-full
-      deploy:
-        - provider: releases
-          file_glob: true
-          file: bin/dub-*.zip
-          skip_cleanup: true
-          api_key: $GH_REPO_TOKEN
-          on:
-            tags: true
-    - d: ldc-1.22.0,dub
-      script: echo "Deploying to GitHub releases (win64) ..." && ARCH=64 ./scripts/ci/release-windows.sh
-      addons:
-        apt:
-          packages:
-            - p7zip-full
-      deploy:
-        - provider: releases
-          file_glob: true
-          file: bin/dub-*.zip
-          skip_cleanup: true
-          api_key: $GH_REPO_TOKEN
-          on:
-            tags: true
-    - stage: update-latest
-      script: echo "Deploying to GitHub pages ..." && mkdir -p docs && git describe --abbrev=0 --tags > docs/LATEST
-      deploy:
-        - provider: pages
-          skip_cleanup: true
-          local_dir: docs
-          github_token: $GH_REPO_TOKEN
-          on:
-            tags: true
-stages:
-  - name: test
-    if: type = pull_request or (type = push and branch = master)
-  # Until deployment of the release binaries is fixed, always build them
-  #- name: deploy
-    #if: type = push and tag =~ ^v\d+\.\d+\.\d+[^-]*\$ # not a pre-release tag
-  - name: update-latest
-    if: type = push and tag =~ ^v\d+\.\d+\.\d+[^-]*\$ # not a pre-release tag
diff --git a/appveyor.yml b/appveyor.yml
deleted file mode 100644
index 9d5e983..0000000
--- a/appveyor.yml
+++ /dev/null
@@ -1,123 +0,0 @@
-platform: x64
-environment:
- matrix:
-  #- DC: dmd
-  #  DVersion: nightly
-  #  arch: x64
-  #- DC: dmd
-  #  DVersion: nightly
-  #  arch: x86
-  - DC: dmd
-    DVersion: beta
-    arch: x64
-  - DC: dmd
-    DVersion: beta
-    arch: x86
-  - DC: dmd
-    DVersion: stable
-    arch: x64
-  - DC: dmd
-    DVersion: 2.086.0
-    arch: x86
-  - DC: dmd
-    DVersion: 2.086.0
-    arch: x64
-  - DC: dmd
-    DVersion: stable
-    arch: x86
-  - DC: ldc
-    DVersion: stable
-    arch: x64
-  - DC: ldc
-    DVersion: 1.15.0
-    arch: x64
-
-skip_tags: false
-branches:
-  only:
-    - master
-    - stable
-
-install:
-  - ps: function ResolveLatestDMD
-        {
-            $version = $env:DVersion;
-            if($version -eq "stable") {
-                $latest = (Invoke-WebRequest "http://downloads.dlang.org/releases/LATEST").toString();
-                $url = "http://downloads.dlang.org/releases/2.x/$($latest)/dmd.$($latest).windows.7z";
-            }elseif($version -eq "beta") {
-                $latest = (Invoke-WebRequest "http://downloads.dlang.org/pre-releases/LATEST").toString();
-                $latestVersion = $latest.split("-")[0].split("~")[0];
-                $url = "http://downloads.dlang.org/pre-releases/2.x/$($latestVersion)/dmd.$($latest).windows.7z";
-            }elseif($version -eq "nightly") {
-                $url = "http://nightlies.dlang.org/dmd-master-2017-05-20/dmd.master.windows.7z"
-            }else {
-                $url = "http://downloads.dlang.org/releases/2.x/$($version)/dmd.$($version).windows.7z";
-            }
-            $env:PATH += ";C:\dmd2\windows\bin;";
-            return $url;
-        }
-  - ps: function ResolveLatestLDC
-        {
-            $version = $env:DVersion;
-            $arch = $env:arch;
-            if($version -eq "stable") {
-                $latest = (Invoke-WebRequest "https://ldc-developers.github.io/LATEST").toString().replace("`n","").replace("`r","");
-                $url = "https://github.com/ldc-developers/ldc/releases/download/v$($latest)/ldc2-$($latest)-windows-$($arch).7z";
-            }elseif($version -eq "beta") {
-                $latest = (Invoke-WebRequest "https://ldc-developers.github.io/LATEST_BETA").toString().replace("`n","").replace("`r","");
-                $url = "https://github.com/ldc-developers/ldc/releases/download/v$($latest)/ldc2-$($latest)-windows-$($arch).7z";
-            } else {
-                $latest = $version;
-                $url = "https://github.com/ldc-developers/ldc/releases/download/v$($version)/ldc2-$($version)-windows-$($arch).7z";
-            }
-            $env:PATH += ";C:\ldc2-$($latest)-windows-$($arch)\bin";
-            $env:DC = "ldc2";
-            return $url;
-        }
-  - ps: function SetUpDCompiler
-        {
-            $env:toolchain = "msvc";
-            if($env:DC -eq "dmd"){
-              echo "downloading ...";
-              $url = ResolveLatestDMD;
-              echo $url;
-              Invoke-WebRequest $url -OutFile "c:\dmd.7z";
-              echo "finished.";
-              pushd c:\\;
-              7z x dmd.7z > $null;
-              popd;
-            }
-            elseif($env:DC -eq "ldc"){
-              echo "downloading ...";
-              $url = ResolveLatestLDC;
-              echo $url;
-              Invoke-WebRequest $url -OutFile "c:\ldc.zip";
-              echo "finished.";
-              pushd c:\\;
-              7z x ldc.zip > $null;
-              popd;
-            }
-        }
-  - ps: SetUpDCompiler
-
-build_script:
-  - ps: if($env:arch -eq "x86"){
-            $env:compilersetupargs = "x86";
-            $env:Darch = "x86";
-            $env:DConf = "m32";
-        }elseif($env:arch -eq "x64"){
-            $env:compilersetupargs = "amd64";
-            $env:Darch = "x86_64";
-            $env:DConf = "m64";
-        }
-  - ps: $env:compilersetup = "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\vcvarsall";
-  - '"%compilersetup%" %compilersetupargs%'
-
-test_script:
- - echo %PLATFORM%
- - echo %Darch%
- - echo %DC%
- - echo %PATH%
- - '%DC% --version'
- - dub test --arch=%Darch% --compiler=%DC%
diff --git a/build-gdc.sh b/build-gdc.sh
deleted file mode 100755
index df0e5ce..0000000
--- a/build-gdc.sh
+++ /dev/null
@@ -1,25 +0,0 @@
-#!/usr/bin/env bash
-set -e
-
-if [ "$GDC" = "" ]; then
-        GDC=gdc
-fi
-
-# link against libcurl
-LIBS=`pkg-config --libs libcurl 2>/dev/null || echo "-lcurl"`
-
-# adjust linker flags for gdc command line
-LIBS=`echo "$LIBS" | sed 's/^-L/-L-L/; s/ -L/ -L-L/g; s/^-l/-L-l/; s/ -l/ -L-l/g'`
-
-echo Generating version file...
-GITVER=$(git describe) || GITVER=unknown
-echo "module dub.version_;" > source/dub/version_.d
-echo "enum dubVersion = \"$GITVER\";" >> source/dub/version_.d
-
-echo Running $GDC...
-$GDC -obin/dub -lcurl -w -fversion=DubUseCurl -fversion=DubApplication -Isource $* $LIBS @build-files.txt
-echo DUB has been built as bin/dub.
-echo
-echo You may want to run
-echo sudo ln -s $(pwd)/bin/dub /usr/local/bin
-echo now.
diff --git a/changelog/add-ability-for-specify-version-range-for-commandline-commands.dd b/changelog/add-ability-for-specify-version-range-for-commandline-commands.dd
new file mode 100644
index 0000000..72ca62a
--- /dev/null
+++ b/changelog/add-ability-for-specify-version-range-for-commandline-commands.dd
@@ -0,0 +1,10 @@
+All commands now accept a version specification
+
+Before this release dub could only get an exact version for some commands
+(`describe`, `generate`, `fetch`, etc...). All commands now accept a version specification,
+such as can be found in `dub.json` / `dub.sdl`:
+
+    dub fetch 'foo@>0.2.0'
+    dub describe foo@'>=0.3.0 <1.0.0'
+
+Note that commands such as `describe` will still not fetch from the network.
diff --git a/changelog/dependency-build-settings.dd b/changelog/dependency-build-settings.dd
new file mode 100644
index 0000000..8859018
--- /dev/null
+++ b/changelog/dependency-build-settings.dd
@@ -0,0 +1,15 @@
+Allow custom build settings to be defined for dependencies
+
+For example:
+---
+{
+    "name": "example",
+    "dependencies": {
+        "vibe-d": { "version" : "~>0.9.2", "dflags" : ["-preview=in"] }
+    }
+}
+---
+
+In this example, `-preview=in` will be applied to `vibe-d` and all of its dependencies.
+Any $(LINK2 build settings, https://dub.pm/package-format-json.html#build-settings) field will be parsed,
+however only `dflags` is taken into account when compiling for now.
diff --git a/changelog/dont-propagate-flags.dd b/changelog/dont-propagate-flags.dd
new file mode 100644
index 0000000..dd5a3fa
--- /dev/null
+++ b/changelog/dont-propagate-flags.dd
@@ -0,0 +1,10 @@
+`DFLAGS` and `LFLAGS` no longer propagate to nested `dub` invocations
+
+`DFLAGS` and `LFLAGS` will no longer be exported as environment variables by default
+when invoking pre-generate, pre-build, pre-run, post-generate, post-build, or post-run commands.
+
+If the previous behavior is still desired, they can be accessed using `$DFLAGS` and `$LFLAGS` in dub.json
+E.g.:
+`preGenerateCommands : ["DFLAGS=$DFLAGS env | grep DFLAGS"]`
+
+will output DFLAGS environment variable with all the dflags used.
diff --git a/changelog/env-d-compiler.dd b/changelog/env-d-compiler.dd
new file mode 100644
index 0000000..8769cea
--- /dev/null
+++ b/changelog/env-d-compiler.dd
@@ -0,0 +1,6 @@
+Use DC environment variable as default D compiler
+
+dub now respects the `DC` environment variable, meaning that `DC=ldc2 dub build` will behave as `dub build --compiler=ldc2`.
+In case both are supplied, the `--compiler` switch still has priority.
+Note that when DUB recursively invokes itself, for example in `preGenerateCommands`,
+it sets the `DC` variable to the compiler it is using, meaning that nested dub invocation will now use the same compiler.
diff --git a/changelog/fix-2051.dd b/changelog/fix-2051.dd
new file mode 100644
index 0000000..497d7ae
--- /dev/null
+++ b/changelog/fix-2051.dd
@@ -0,0 +1,3 @@
+Fix #2051 "Running unit tests from DUB single file packages fails"
+
+Now dub is capable run test command in single mode like: `dub test --single yoursinglefile.d`
\ No newline at end of file
diff --git a/changelog/improved-ldc-cross-compile.dd b/changelog/improved-ldc-cross-compile.dd
new file mode 100644
index 0000000..1ddaf22
--- /dev/null
+++ b/changelog/improved-ldc-cross-compile.dd
@@ -0,0 +1,3 @@
+Improve ldc cross compilation
+
+Enables co-existence and parallel compilation of the same project with different settings (e.g. cross compilation) by moving `.dub/obj` to `$DUB_TARGET_PATH/obj`.
\ No newline at end of file
diff --git a/changelog/improved-list-command.dd b/changelog/improved-list-command.dd
new file mode 100644
index 0000000..c52a061
--- /dev/null
+++ b/changelog/improved-list-command.dd
@@ -0,0 +1,6 @@
+Filter ability for list command
+
+For list command added optional filtration by name and version specification:
+
+    dub list foo
+    dub list foo@'>=0.1.0 <1.0.0'
diff --git a/semaphore-ci.sh b/semaphore-ci.sh
deleted file mode 100755
index c942ed9..0000000
--- a/semaphore-ci.sh
+++ /dev/null
@@ -1,41 +0,0 @@
-#!/bin/bash
-
-set -euo pipefail
-set -x
-
-if  [ "${D_VERSION:-dmd}" == "gdc" ] ; then
-    echo "GDC unrelated test failures to be fixed"
-    exit 0
-
-    # Use the dub-updating fork of the installer script until https://github.com/dlang/installer/pull/301 is merged
-    wget https://raw.githubusercontent.com/wilzbach/installer-dub/master/script/install.sh -O install.dub.sh
-    bash install.dub.sh -a dub
-    dub_path_activate="$(find $HOME/dlang/*/activate | head -1)"
-    rm "${dub_path_activate}"
-    dub_path="$(dirname "$dub_path_activate")"
-    sudo ln -s "${dub_path}/dub" /usr/bin/dub
-
-    export DMD=gdmd
-    export DC=gdc
-    # It's technically ~"2.076", but Ternary doesn't seem to have been ported and Vibe.d seems to depend on this.
-    # Ternary was added in 2.072: https://dlang.org/phobos/std_typecons.html#.Ternary
-    # However, the nonet tests is done only for > 2.072
-    export FRONTEND=2.072
-
-    sudo add-apt-repository -y ppa:ubuntu-toolchain-r/test
-    sudo apt-get update
-    sudo apt-get install -y gdc-9
-    # fetch the dmd-like wrapper
-    sudo wget https://raw.githubusercontent.com/D-Programming-GDC/GDMD/master/dmd-script -O /usr/bin/gdmd
-    sudo chmod +x /usr/bin/gdmd
-    # DUB requires gdmd
-    sudo ln -s /usr/bin/gdc-9 /usr/bin/gdc
-    # fake install script and create a fake 'activate' script
-    mkdir -p ~/dlang/gdc-9
-    echo "deactivate(){ echo;}" > ~/dlang/gdc-9/activate
-
-else
-    . $(curl --connect-timeout 5 --max-time 10 --retry 5 --retry-delay 1 --retry-max-time 60 https://dlang.org/install.sh | bash -s "$D_VERSION" -a)
-fi
-
-./scripts/ci/travis.sh
diff --git a/source/dub/commandline.d b/source/dub/commandline.d
index 4e0932c..04f5d69 100644
--- a/source/dub/commandline.d
+++ b/source/dub/commandline.d
@@ -991,11 +991,10 @@
 	protected void setupVersionPackage(Dub dub, string str_package_info, string default_build_type = "debug")
 	{
 		PackageAndVersion package_info = splitPackageName(str_package_info);	
-		Version ver = package_info.version_.length ? Version(package_info.version_) : Version.unknown;
-		setupPackage(dub, package_info.name, default_build_type, ver);
+		setupPackage(dub, package_info.name, default_build_type, package_info.version_);
 	}
 
-	protected void setupPackage(Dub dub, string package_name, string default_build_type = "debug", Version ver = Version.unknown)
+	protected void setupPackage(Dub dub, string package_name, string default_build_type = "debug", string ver = "")
 	{
 		if (!m_compilerName.length) m_compilerName = dub.defaultCompiler;
 		if (!m_arch.length) m_arch = dub.defaultArchitecture;
@@ -1039,7 +1038,7 @@
 		}
 	}
 
-	private bool loadSpecificPackage(Dub dub, string package_name, Version ver)
+	private bool loadSpecificPackage(Dub dub, string package_name, string ver)
 	{
 		if (m_single) {
 			enforce(package_name.length, "Missing file name of single-file package.");
@@ -1061,12 +1060,12 @@
 
 		enforce(package_name.length, "No valid root package found - aborting.");
 
-		auto pack = ver.isUnknown
+		auto pack = ver == ""
 			? dub.packageManager.getLatestPackage(package_name)
-			: dub.packageManager.getPackage(package_name, ver);
+			: dub.packageManager.getBestPackage(package_name, ver);
 
 		enforce(pack, format!"Failed to find a package named '%s%s' locally."(package_name,
-			ver.isUnknown ? "" : "@" ~ ver.toString()
+			ver == "" ? "" : ("@" ~ ver)
 		));
 		logInfo("Building package %s in %s", pack.name, pack.path.toNativeString());
 		dub.loadPackage(pack);
@@ -2062,20 +2061,28 @@
 	this() @safe pure nothrow
 	{
 		this.name = "list";
-		this.argumentsPattern = "";
-		this.description = "Prints a list of all local packages dub is aware of";
+		this.argumentsPattern = "[<package>[@<version-spec>]]";
+		this.description = "Prints a list of all or selected local packages dub is aware of";
 		this.helpText = [
-			"Prints a list of all local packages. This includes all cached packages (user or system wide), all packages in the package search paths (\"dub add-path\") and all manually registered packages (\"dub add-local\")."
+			"Prints a list of all or selected local packages. This includes all cached "~
+			"packages (user or system wide), all packages in the package search paths "~
+			"(\"dub add-path\") and all manually registered packages (\"dub add-local\"). "~
+			"If package specified output filtered by package spec."
 		];
 	}
 	override void prepare(scope CommandArgs args) {}
 	override int execute(Dub dub, string[] free_args, string[] app_args)
 	{
-		enforceUsage(free_args.length == 0, "Expecting no extra arguments.");
+		enforceUsage(free_args.length <= 1, "Expecting zero or one extra arguments.");
+		const pinfo = free_args.length ? splitPackageName(free_args[0]) : PackageAndVersion("","*");
+		const pname = pinfo.name;
+		const pvlim = Dependency(pinfo.version_ == "" ? "*" : pinfo.version_);
 		enforceUsage(app_args.length == 0, "The list command supports no application arguments.");
 		logInfo("Packages present in the system and known to dub:");
-		foreach (p; dub.packageManager.getPackageIterator())
-			logInfo("  %s %s: %s", p.name, p.version_, p.path.toNativeString());
+		foreach (p; dub.packageManager.getPackageIterator()) {
+			if ((pname == "" || pname == p.name) && pvlim.matches(p.version_))
+				logInfo("  %s %s: %s", p.name, p.version_, p.path.toNativeString());
+		}
 		logInfo("");
 		return 0;
 	}
diff --git a/source/dub/compilers/ldc.d b/source/dub/compilers/ldc.d
index 232c44a..2fbe362 100644
--- a/source/dub/compilers/ldc.d
+++ b/source/dub/compilers/ldc.d
@@ -104,6 +104,7 @@
 
 	void prepareBuildSettings(ref BuildSettings settings, const scope ref BuildPlatform platform, BuildSetting fields = BuildSetting.all) const
 	{
+		import std.format : format;
 		enforceBuildRequirements(settings);
 
 		if (!(fields & BuildSetting.options)) {
@@ -113,7 +114,7 @@
 		}
 
 		// since LDC always outputs multiple object files, avoid conflicts by default
-		settings.addDFlags("--oq", "-od=.dub/obj");
+		settings.addDFlags("--oq", format("-od=%s/obj", settings.targetPath));
 
 		if (!(fields & BuildSetting.versions)) {
 			settings.addDFlags(settings.versions.map!(s => "-d-version="~s)().array());
diff --git a/source/dub/dub.d b/source/dub/dub.d
index 3d05126..e88ece2 100644
--- a/source/dub/dub.d
+++ b/source/dub/dub.d
@@ -663,7 +663,10 @@
 			foreach (file; lbuildsettings.sourceFiles) {
 				if (file.endsWith(".d")) {
 					auto fname = NativePath(file).head.name;
-					if (NativePath(file).relativeTo(m_project.rootPackage.path) == NativePath(mainfil)) {
+					NativePath msf = NativePath(mainfil);
+					if (msf.absolute)
+						msf = msf.relativeTo(m_project.rootPackage.path);
+					if (NativePath(file).relativeTo(m_project.rootPackage.path) == msf) {
 						logWarn("Excluding main source file %s from test.", mainfil);
 						tcinfo.excludedSourceFiles[""] ~= mainfil;
 						continue;
@@ -817,7 +820,6 @@
 		// TODO: clear target files and copy files
 
 		if (existsFile(path ~ ".dub/build")) rmdirRecurse((path ~ ".dub/build").toNativeString());
-		if (existsFile(path ~ ".dub/obj")) rmdirRecurse((path ~ ".dub/obj").toNativeString());
 		if (existsFile(path ~ ".dub/metadata_cache.json")) std.file.remove((path ~ ".dub/metadata_cache.json").toNativeString());
 
 		auto p = Package.load(path);
@@ -1380,7 +1382,11 @@
 		import std.process : environment;
 		import std.range : front;
 
-		m_defaultCompiler = m_config.defaultCompiler.expandTilde;
+		// Env takes precedence
+		if (auto envCompiler = environment.get("DC"))
+			m_defaultCompiler = envCompiler;
+		else
+			m_defaultCompiler = m_config.defaultCompiler.expandTilde;
 		if (m_defaultCompiler.length && m_defaultCompiler.isAbsolute)
 			return;
 
diff --git a/source/dub/generators/generator.d b/source/dub/generators/generator.d
index cf47fd8..9ab99e7 100644
--- a/source/dub/generators/generator.d
+++ b/source/dub/generators/generator.d
@@ -314,20 +314,45 @@
 		visited.clear();
 
 		// 1. downwards inherits versions, debugVersions, and inheritable build settings
-		static void configureDependencies(const scope ref TargetInfo ti, TargetInfo[string] targets, size_t level = 0)
+		static void configureDependencies(const scope ref TargetInfo ti, TargetInfo[string] targets,
+											BuildSettings[string] dependBS, size_t level = 0)
 		{
+
+			static void applyForcedSettings(const scope ref BuildSettings forced, ref BuildSettings child) {
+				child.addDFlags(forced.dflags);
+			}
+
 			// do not use `visited` here as dependencies must inherit
 			// configurations from *all* of their parents
 			logDebug("%sConfigure dependencies of %s, deps:%(%s, %)", ' '.repeat(2 * level), ti.pack.name, ti.dependencies);
 			foreach (depname; ti.dependencies)
 			{
+				BuildSettings forcedSettings;
 				auto pti = &targets[depname];
 				mergeFromDependent(ti.buildSettings, pti.buildSettings);
-				configureDependencies(*pti, targets, level + 1);
+
+				if (auto matchedSettings = depname in dependBS)
+					forcedSettings = *matchedSettings;
+				else if (auto matchedSettings = "*" in dependBS)
+					forcedSettings = *matchedSettings;
+
+				applyForcedSettings(forcedSettings, pti.buildSettings);
+				configureDependencies(*pti, targets, ["*" : forcedSettings], level + 1);
 			}
 		}
 
-		configureDependencies(*roottarget, targets);
+		BuildSettings[string] dependencyBuildSettings;
+		foreach (key, value; rootPackage.recipe.buildSettings.dependencyBuildSettings)
+		{
+			BuildSettings buildSettings;
+			if (auto target = key in targets)
+			{
+				value.getPlatformSettings(buildSettings, genSettings.platform, target.pack.path);
+				buildSettings.processVars(m_project, target.pack, buildSettings, genSettings, true);
+				dependencyBuildSettings[key] = buildSettings;
+			}
+		}
+		configureDependencies(*roottarget, targets, dependencyBuildSettings);
 
 		// 2. add Have_dependency_xyz for all direct dependencies of a target
 		// (includes incorporated non-target dependencies and their dependencies)
@@ -776,8 +801,6 @@
 	string[string] env = environment.toAA();
 	// TODO: do more elaborate things here
 	// TODO: escape/quote individual items appropriately
-	env["DFLAGS"]                = join(cast(string[])build_settings.dflags, " ");
-	env["LFLAGS"]                = join(cast(string[])build_settings.lflags," ");
 	env["VERSIONS"]              = join(cast(string[])build_settings.versions," ");
 	env["LIBS"]                  = join(cast(string[])build_settings.libs," ");
 	env["SOURCE_FILES"]          = join(cast(string[])build_settings.sourceFiles," ");
diff --git a/source/dub/internal/libInputVisitor.d b/source/dub/internal/libInputVisitor.d
index d388b78..4961549 100644
--- a/source/dub/internal/libInputVisitor.d
+++ b/source/dub/internal/libInputVisitor.d
@@ -1,4 +1,4 @@
-module dub.internal.libInputVisitor;
+module dub.internal.libInputVisitor;
 
 version (Have_libInputVisitor) public import libInputVisitor;
 else:
diff --git a/source/dub/internal/sdlang/parser.d b/source/dub/internal/sdlang/parser.d
index 8ccf119..023dffc 100644
--- a/source/dub/internal/sdlang/parser.d
+++ b/source/dub/internal/sdlang/parser.d
@@ -1,4 +1,4 @@
-// SDLang-D
+// SDLang-D
 // Written in the D programming language.
 
 module dub.internal.sdlang.parser;
diff --git a/source/dub/project.d b/source/dub/project.d
index edfd20b..2f96a8e 100644
--- a/source/dub/project.d
+++ b/source/dub/project.d
@@ -1396,6 +1396,15 @@
 
 	if (name == "BUILD_TYPE") return gsettings.buildType;
 
+	if (name == "DFLAGS" || name == "LFLAGS")
+	{
+		auto buildSettings = pack.getBuildSettings(gsettings.platform, gsettings.config);
+		if (name == "DFLAGS")
+			return join(buildSettings.dflags," ");
+		else if (name == "LFLAGS")
+			return join(buildSettings.lflags," ");
+	}
+
 	auto envvar = environment.get(name);
 	if (envvar !is null) return envvar;
 
@@ -1419,6 +1428,10 @@
 		}
 		string name;
 		NativePath path;
+		BuildSettings getBuildSettings(in BuildPlatform platform, string config) const
+		{
+			return BuildSettings();
+		}
 	}
 
 	static struct MockProject
diff --git a/source/dub/recipe/json.d b/source/dub/recipe/json.d
index 54486c7..60e7626 100644
--- a/source/dub/recipe/json.d
+++ b/source/dub/recipe/json.d
@@ -177,7 +177,13 @@
 						pkg = package_name ~ pkg;
 					}
 					enforce(pkg !in bs.dependencies, "The dependency '"~pkg~"' is specified more than once." );
-					bs.dependencies[pkg] = deserializeJson!Dependency(verspec);
+					bs.dependencies[pkg] = Dependency.fromJson(verspec);
+					if (verspec.type == Json.Type.object)
+					{
+						BuildSettingsTemplate dbs;
+						dbs.parseJson(verspec, package_name);
+						bs.dependencyBuildSettings[pkg] = dbs;
+					}
 				}
 				break;
 			case "systemDependencies":
@@ -251,7 +257,7 @@
 	if( bs.dependencies !is null ){
 		auto deps = Json.emptyObject;
 		foreach( pack, d; bs.dependencies )
-			deps[pack] = serializeToJson(d);
+			deps[pack] = d.toJson();
 		ret["dependencies"] = deps;
 	}
 	if (bs.systemDependencies !is null) ret["systemDependencies"] = bs.systemDependencies;
diff --git a/source/dub/recipe/packagerecipe.d b/source/dub/recipe/packagerecipe.d
index e03fa92..f03a943 100644
--- a/source/dub/recipe/packagerecipe.d
+++ b/source/dub/recipe/packagerecipe.d
@@ -176,6 +176,7 @@
 /// a certain BuildPlatform.
 struct BuildSettingsTemplate {
 	Dependency[string] dependencies;
+	BuildSettingsTemplate[string] dependencyBuildSettings;
 	string systemDependencies;
 	TargetType targetType = TargetType.autodetect;
 	string targetPath;
diff --git a/test/.gitignore b/test/.gitignore
index e8ce8bd..6b02e75 100644
--- a/test/.gitignore
+++ b/test/.gitignore
@@ -17,3 +17,4 @@
 version-spec/**/foo
 
 /test_registry
+/issue_2051_running_unittests_from_dub_single_file_packages_fails
diff --git a/test/dc-env.sh b/test/dc-env.sh
new file mode 100755
index 0000000..e5ea3bc
--- /dev/null
+++ b/test/dc-env.sh
@@ -0,0 +1,6 @@
+#!/usr/bin/env bash
+
+. $(dirname "${BASH_SOURCE[0]}")/common.sh
+cd ${CURR_DIR}/issue2012-dc-env
+
+$DUB app.d ${DC}
diff --git a/test/depen-build-settings/.gitignore b/test/depen-build-settings/.gitignore
new file mode 100644
index 0000000..3dfd42f
--- /dev/null
+++ b/test/depen-build-settings/.gitignore
@@ -0,0 +1,4 @@
+depend.json
+depend2.json
+depen-build-settings.json
+depen-build-settings
diff --git a/test/depen-build-settings/.no_test b/test/depen-build-settings/.no_test
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/test/depen-build-settings/.no_test
diff --git a/test/depen-build-settings/depend/depend2/dub.json b/test/depen-build-settings/depend/depend2/dub.json
new file mode 100644
index 0000000..b3ac9ae
--- /dev/null
+++ b/test/depen-build-settings/depend/depend2/dub.json
@@ -0,0 +1,5 @@
+{
+	"targetType": "library",
+	"description": "A minimal D application.",
+	"name": "depend2"
+}
diff --git a/test/depen-build-settings/depend/depend2/source/depend2.d b/test/depen-build-settings/depend/depend2/source/depend2.d
new file mode 100644
index 0000000..31b6367
--- /dev/null
+++ b/test/depen-build-settings/depend/depend2/source/depend2.d
@@ -0,0 +1,6 @@
+import std.stdio;
+
+extern (C) void depend2_func()
+{
+	writeln("depend2_func");
+}
diff --git a/test/depen-build-settings/depend/dub.json b/test/depen-build-settings/depend/dub.json
new file mode 100644
index 0000000..4d7ad5a
--- /dev/null
+++ b/test/depen-build-settings/depend/dub.json
@@ -0,0 +1,9 @@
+{
+	"targetType": "library",
+	"description": "A minimal D application.",
+	"name": "depend1",
+
+	"dependencies": {
+		"depend2": { "version" : "*" }
+	}
+}
diff --git a/test/depen-build-settings/depend/source/depend.d b/test/depen-build-settings/depend/source/depend.d
new file mode 100644
index 0000000..d9bb981
--- /dev/null
+++ b/test/depen-build-settings/depend/source/depend.d
@@ -0,0 +1,9 @@
+import std.stdio;
+
+extern (C) void depend2_func();
+
+extern (C) void depend1_func()
+{
+	writeln("depend1_func");
+	depend2_func();
+}
diff --git a/test/depen-build-settings/dub.json b/test/depen-build-settings/dub.json
new file mode 100644
index 0000000..1769ac1
--- /dev/null
+++ b/test/depen-build-settings/dub.json
@@ -0,0 +1,8 @@
+{
+	"description": "A minimal D application.",
+	"name": "depen-build-settings",
+
+	"dependencies": {
+		"depend1": { "version" : "*", "dflags" : ["-X"] }
+	}
+}
diff --git a/test/depen-build-settings/dub.selections.json b/test/depen-build-settings/dub.selections.json
new file mode 100644
index 0000000..584b513
--- /dev/null
+++ b/test/depen-build-settings/dub.selections.json
@@ -0,0 +1,7 @@
+{
+	"fileVersion": 1,
+	"versions": {
+		"depend1": {"path":"depend/"},
+		"depend2": {"path":"depend/depend2/"}
+	}
+}
diff --git a/test/depen-build-settings/source/app.d b/test/depen-build-settings/source/app.d
new file mode 100644
index 0000000..8893119
--- /dev/null
+++ b/test/depen-build-settings/source/app.d
@@ -0,0 +1,12 @@
+import std.stdio;
+import std.file;
+
+extern (C) void depend1_func();
+
+void main()
+{
+	writeln("Edit source/app.d to start your project.");
+	depend1_func();
+	assert(exists("depend2.json"));
+	assert(exists("depend.json"));
+}
diff --git a/test/issue2012-dc-env/.no_build b/test/issue2012-dc-env/.no_build
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/test/issue2012-dc-env/.no_build
diff --git a/test/issue2012-dc-env/app.d b/test/issue2012-dc-env/app.d
new file mode 100644
index 0000000..4b1f4d1
--- /dev/null
+++ b/test/issue2012-dc-env/app.d
@@ -0,0 +1,18 @@
+#!/usr/bin/env dub
+/+ dub.sdl:
+	name "app"
++/
+
+import std.format;
+
+void main(string[] args)
+{
+    version (LDC)
+        immutable expected = "ldc2";
+    version (DigitalMars)
+        immutable expected = "dmd";
+    version (GNU)
+        immutable expected = "gdc";
+
+    assert(expected == args[1], format!"Expected '%s' but got '%s'"(expected, args[1]));
+}
diff --git a/test/issue564-invalid-upgrade-dependency/a-1.0.0/source/a.d b/test/issue564-invalid-upgrade-dependency/a-1.0.0/source/a.d
index b430cbc..45d8a32 100644
--- a/test/issue564-invalid-upgrade-dependency/a-1.0.0/source/a.d
+++ b/test/issue564-invalid-upgrade-dependency/a-1.0.0/source/a.d
@@ -1,3 +1,3 @@
-void test()
-{
-}
\ No newline at end of file
+void test()
+{
+}
diff --git a/test/issue564-invalid-upgrade-dependency/a-1.1.0/source/a.d b/test/issue564-invalid-upgrade-dependency/a-1.1.0/source/a.d
index b430cbc..45d8a32 100644
--- a/test/issue564-invalid-upgrade-dependency/a-1.1.0/source/a.d
+++ b/test/issue564-invalid-upgrade-dependency/a-1.1.0/source/a.d
@@ -1,3 +1,3 @@
-void test()
-{
-}
\ No newline at end of file
+void test()
+{
+}
diff --git a/test/issue564-invalid-upgrade-dependency/main/source/app.d b/test/issue564-invalid-upgrade-dependency/main/source/app.d
index c0b76f0..b248b89 100644
--- a/test/issue564-invalid-upgrade-dependency/main/source/app.d
+++ b/test/issue564-invalid-upgrade-dependency/main/source/app.d
@@ -1,6 +1,6 @@
-import a;
-
-void main()
-{
-	test();
-}
+import a;
+
+void main()
+{
+	test();
+}
diff --git a/test/issue895-local-configuration.sh b/test/issue895-local-configuration.sh
index 9799288..8593c00 100755
--- a/test/issue895-local-configuration.sh
+++ b/test/issue895-local-configuration.sh
@@ -20,6 +20,8 @@
 
 trap cleanup EXIT
 
+unset DC
+
 if ! { ${DUB} describe --single issue103-single-file-package.d 2>&1 || true; } | grep -cF "Unknown compiler: $(dirname $CURR_DIR)/bin/foo"; then
 	rm ../bin/foo
 	die $LINENO 'DUB did not find the local configuration with an adjacent compiler.'
diff --git a/test/issue_2051_running_unittests_from_dub_single_file_packages_fails.d b/test/issue_2051_running_unittests_from_dub_single_file_packages_fails.d
new file mode 100644
index 0000000..08a45ad
--- /dev/null
+++ b/test/issue_2051_running_unittests_from_dub_single_file_packages_fails.d
@@ -0,0 +1,76 @@
+/+ dub.sdl:
+   name "issue_2051_running_unittests_from_dub_single_file_packages_fails"
+ +/
+
+import std.algorithm : any;
+import std.conv : text;
+import std.file : tempDir;
+import std.stdio : File, writeln;
+import std.string : lineSplitter;
+import std.path : buildPath;
+import std.process : environment, executeShell;
+
+auto executeCommand(string command)
+{
+	import std.exception : enforce;
+
+	auto dub = executeShell(command);
+	writeln("--- dub output:");
+	foreach(line; dub.output.lineSplitter)
+		writeln("\t", line);
+	writeln("--- end of dub output");
+
+	enforce(dub.status == 0, "couldn't build the project, see above");
+
+	return dub.output;
+}
+
+/// check dub output to determine rebuild has not been triggered
+auto checkUnittestsResult(string output)
+{
+	if (output.lineSplitter.any!(a=> a == "All unit tests have been run successfully."))
+	{
+		writeln("\nOk. Unittest passed.");
+		return 0;
+	}
+	else
+	{
+		writeln("\nError. Unittests failed.");
+		return 1;
+	}
+}
+
+int main()
+{
+	auto dub = environment.get("DUB");
+	if (!dub.length)
+		dub = buildPath(".", "bin", "dub");
+
+	string filename;
+	// create test_project
+	{
+		filename = tempDir.buildPath("issue_2051.d");
+		auto f = File(filename, "w");
+		f.write(
+`#!/usr/bin/env dub
+/+ dub.sdl:
+	name "issue2051"
++/
+
+version(unittest) {}
+else void main()
+{
+}
+
+unittest
+{
+	auto input = [1721];
+	assert(input[0] == 1721);
+}
+`		);
+	}
+
+	return text(dub, " test --single ", filename)
+		.executeCommand
+		.checkUnittestsResult;
+}
\ No newline at end of file
diff --git a/test/removed-dub-obj.sh b/test/removed-dub-obj.sh
new file mode 100755
index 0000000..3686c61
--- /dev/null
+++ b/test/removed-dub-obj.sh
@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+
+. $(dirname "${BASH_SOURCE[0]}")/common.sh
+cd ${CURR_DIR}/removed-dub-obj
+rm -rf .dub
+
+${DUB} build --compiler=${DC}
+
+[ -d ".dub/obj" ] && die $LINENO '.dub/obj was found'
+
+if [[ ${DC} == *"ldc"* ]]; then
+    [ -f .dub/build/library-*ldc*/obj/test.o* ] || die $LINENO '.dub/build/library-*ldc*/obj/test.o* was not found'
+fi
+
+exit 0
\ No newline at end of file
diff --git a/test/removed-dub-obj/.no_build b/test/removed-dub-obj/.no_build
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/test/removed-dub-obj/.no_build
diff --git a/test/removed-dub-obj/.no_run b/test/removed-dub-obj/.no_run
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/test/removed-dub-obj/.no_run
diff --git a/test/removed-dub-obj/.no_test b/test/removed-dub-obj/.no_test
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/test/removed-dub-obj/.no_test
diff --git a/test/removed-dub-obj/dub.sdl b/test/removed-dub-obj/dub.sdl
new file mode 100644
index 0000000..86660c8
--- /dev/null
+++ b/test/removed-dub-obj/dub.sdl
@@ -0,0 +1,3 @@
+name "removed-dub-obj"
+
+targetType "staticLibrary"
\ No newline at end of file
diff --git a/test/removed-dub-obj/source/test.d b/test/removed-dub-obj/source/test.d
new file mode 100644
index 0000000..c6e2276
--- /dev/null
+++ b/test/removed-dub-obj/source/test.d
@@ -0,0 +1,6 @@
+module test;
+
+unittest
+{
+    assert(true);
+}
\ No newline at end of file
diff --git a/test/version-spec.sh b/test/version-spec.sh
index 76b54b8..8d0677f 100755
--- a/test/version-spec.sh
+++ b/test/version-spec.sh
@@ -9,6 +9,13 @@
 [[ $($DUB describe foo@1.0.0 | grep path | head -n 1) == *"/newfoo/"* ]]
 [[ $($DUB describe foo@0.1.0 | grep path | head -n 1) == *"/oldfoo/"* ]]
 
+[[ $($DUB describe foo@'<1.0.0' | grep path | head -n 1) == *"/oldfoo/"* ]]
+[[ $($DUB describe foo@'>0.1.0' | grep path | head -n 1) == *"/newfoo/"* ]]
+[[ $($DUB describe foo@'>0.2.0' | grep path | head -n 1) == *"/newfoo/"* ]]
+[[ $($DUB describe foo@'<=0.2.0' | grep path | head -n 1) == *"/oldfoo/"* ]]
+[[ $($DUB describe foo@'*' | grep path | head -n 1) == *"/newfoo/"* ]]
+[[ $($DUB describe foo@'>0.0.1 <2.0.0' | grep path | head -n 1) == *"/newfoo/"* ]]
+
 [[ $($DUB test foo | head -n 1) == *"/newfoo/" ]]
 [[ $($DUB test foo@1.0.0 | head -n 1) == *"/newfoo/" ]]
 [[ $($DUB test foo@0.1.0 | head -n 1) == *"/oldfoo/" ]]
@@ -29,6 +36,10 @@
 [[ $($DUB run -n foo@1.0.0 | tail -n 1) == 'new-foo' ]]
 [[ $($DUB run -n foo@0.1.0 | tail -n 1) == 'old-foo' ]]
 
+[[ $($DUB list foo | wc -l) == '4' ]]
+[[ $($DUB list foo@0.1.0 | wc -l) == '3' ]]
+[[ $($DUB list foo@'>0.1.0' | head -n 2 | tail -n 1) == *"/newfoo"* ]]
+
 $DUB remove-local "$CURR_DIR/version-spec/newfoo"
 $DUB remove-local "$CURR_DIR/version-spec/oldfoo"