diff --git a/source/dub/compilers/compiler.d b/source/dub/compilers/compiler.d
index 36456e3..8091260 100644
--- a/source/dub/compilers/compiler.d
+++ b/source/dub/compilers/compiler.d
@@ -312,6 +312,7 @@
 
 enum TargetType {
 	autodetect,
+	none,
 	executable,
 	library,
 	sourceLibrary,
@@ -338,6 +339,7 @@
 	assert(settings.targetName.length > 0, "No target name set.");
 	final switch(settings.targetType){
 		case TargetType.autodetect: assert(false);
+		case TargetType.none: return null;
 		case TargetType.sourceLibrary: return null;
 		case TargetType.executable:
 			if( platform.platform.canFind("windows") )
diff --git a/source/dub/compilers/dmd.d b/source/dub/compilers/dmd.d
index 0fbc3c5..108ffde 100644
--- a/source/dub/compilers/dmd.d
+++ b/source/dub/compilers/dmd.d
@@ -93,6 +93,7 @@
 	{
 		final switch(settings.targetType){
 			case TargetType.autodetect: assert(false, "Invalid target type: autodetect");
+			case TargetType.none: assert(false, "Invalid target type: none");
 			case TargetType.sourceLibrary: assert(false, "Invalid target type: sourceLibrary");
 			case TargetType.executable: break;
 			case TargetType.library:
diff --git a/source/dub/compilers/gdc.d b/source/dub/compilers/gdc.d
index 3aa0878..3ff3468 100644
--- a/source/dub/compilers/gdc.d
+++ b/source/dub/compilers/gdc.d
@@ -135,6 +135,7 @@
 	{
 		final switch(settings.targetType){
 			case TargetType.autodetect: assert(false, "Invalid target type: autodetect");
+			case TargetType.none: assert(false, "Invalid target type: none");
 			case TargetType.sourceLibrary: assert(false, "Invalid target type: sourceLibrary");
 			case TargetType.executable: break;
 			case TargetType.library:
diff --git a/source/dub/compilers/ldc.d b/source/dub/compilers/ldc.d
index 1fb27dc..385acbc 100644
--- a/source/dub/compilers/ldc.d
+++ b/source/dub/compilers/ldc.d
@@ -95,6 +95,7 @@
 	{
 		final switch(settings.targetType){
 			case TargetType.autodetect: assert(false, "Invalid target type: autodetect");
+			case TargetType.none: assert(false, "Invalid target type: none");
 			case TargetType.sourceLibrary: assert(false, "Invalid target type: sourceLibrary");
 			case TargetType.executable: break;
 			case TargetType.library:
diff --git a/source/dub/generators/visuald.d b/source/dub/generators/visuald.d
index 8cf0d8b..1786084 100644
--- a/source/dub/generators/visuald.d
+++ b/source/dub/generators/visuald.d
@@ -125,18 +125,25 @@
 				projUuid, projName, projPath, projectUuid);
 
 			version(VISUALD_SEPERATE_PROJECT_FILES) {
+				void addDepsRec(in Package p)
+				{
+					foreach(id, dependency; p.dependencies) {
+						auto deppack = m_app.getDependency(id, true);
+						if (!deppack) continue;
+						if (isHeaderOnlyPackage(deppack, settings)) {
+							addDepsRec(deppack);
+						} else {
+							// TODO: clarify what "uuid = uuid" should mean
+							auto uuid = guid(id);
+							ret.formattedWrite("\n			%s = %s", uuid, uuid);
+						}
+					}
+				}
+
 				if(pack.dependencies.length > 0) {
 					ret.formattedWrite("
 		ProjectSection(ProjectDependencies) = postProject");
-					foreach(id, dependency; pack.dependencies) {
-						auto deppack = m_app.getDependency(id, true);
-						if (!deppack || isHeaderOnlyPackage(deppack, settings))
-							continue;
-						// TODO: clarify what "uuid = uuid" should mean
-						auto uuid = guid(id);
-						ret.formattedWrite("
-			%s = %s", uuid, uuid);
-					}
+					addDepsRec(pack);
 					ret.formattedWrite("
 		EndProjectSection");
 				}
diff --git a/source/dub/package_.d b/source/dub/package_.d
index 28b44cf..2cd109d 100644
--- a/source/dub/package_.d
+++ b/source/dub/package_.d
@@ -106,7 +106,7 @@
 				}
 
 				if (m_info.version_.length == 0) {
-					logDiagnostic("Failed to determine version of package %s at %s. Assuming ~master.", m_info.name, this.path.toNativeString());
+					logDiagnostic("Note: Failed to determine version of package %s at %s. Assuming ~master.", m_info.name, this.path.toNativeString());
 					m_info.version_ = "~master";
 				} else logDiagnostic("Determined package version using GIT: %s %s", m_info.name, m_info.version_);
 			}
@@ -118,7 +118,7 @@
 				BuildSettingsTemplate app_settings;
 				app_settings.targetType = TargetType.executable;
 				m_info.configurations ~= ConfigurationInfo("application", app_settings);
-			} else {
+			} else if (m_info.buildSettings.targetType != TargetType.none) {
 				if( m_info.buildSettings.targetType == TargetType.autodetect ){
 					if( app_files.length ){
 						BuildSettingsTemplate app_settings;
@@ -150,6 +150,7 @@
 	@property Path path() const { return m_path; }
 	@property Path packageInfoFile() const { return m_path ~ "package.json"; }
 	@property const(Dependency[string]) dependencies() const { return m_info.dependencies; }
+	@property inout(Package) basePackage() inout { return m_parentPackage ? m_parentPackage.basePackage : this; }
 	@property inout(Package) parentPackage() inout { return m_parentPackage; }
 	@property inout(Package)[] subPackages() inout { return m_subPackages; }
 
@@ -179,16 +180,17 @@
 	/// Returns all BuildSettings for the given platform and config.
 	BuildSettings getBuildSettings(in BuildPlatform platform, string config)
 	const {
+		BuildSettings ret;
 		logDiagnostic("Using config %s for %s", config, this.name);
 		foreach(ref conf; m_info.configurations){
 			if( conf.name != config ) continue;
-			BuildSettings ret;
 			m_info.buildSettings.getPlatformSettings(ret, platform, this.path);
 			conf.buildSettings.getPlatformSettings(ret, platform, this.path);
 			if( ret.targetName.empty ) ret.targetName = this.name.replace(":", "_");
 			return ret;
 		}
-		assert(false, "Unknown configuration for "~m_info.name~": "~config);
+		assert(config is null, "Unknown configuration for "~m_info.name~": "~config);
+		return ret;
 	}
 
 	string getSubConfiguration(string config, in Package dependency, in BuildPlatform platform)
@@ -201,7 +203,7 @@
 				break;
 			}
 		}
-		assert(found, "Invliad configuration \""~config~"\" for "~this.name);
+		assert(found || config is null, "Invalid configuration \""~config~"\" for "~this.name);
 		if( auto pv = dependency.name in m_info.buildSettings.subConfigurations ) return *pv;
 		return null;
 	}
@@ -214,7 +216,7 @@
 			if( !is_main_package && conf.buildSettings.targetType == TargetType.executable ) continue;
 			return conf.name;
 		}
-		throw new Exception(format("Found no suitable configuration for %s on this platform.", this.name));
+		return null;
 	}
 
 	/// Human readable information of this package and its dependencies.
diff --git a/source/dub/project.d b/source/dub/project.d
index e3d9e9b..669d978 100644
--- a/source/dub/project.d
+++ b/source/dub/project.d
@@ -253,8 +253,10 @@
 			dst.addVersions(["Have_" ~ stripDlangSpecialChars(pkg.name)]);
 
 			auto psettings = pkg.getBuildSettings(platform, configs[pkg.name]);
-			processVars(dst, pkg.path.toNativeString(), psettings);
-			if( pkg is m_main ){
+			if (psettings.targetType != TargetType.none)
+				processVars(dst, pkg.path.toNativeString(), psettings);
+			if (pkg is m_main) {
+				enforce(psettings.targetType != TargetType.none, "Main package has target type \"none\" - stopping build.");
 				dst.targetType = psettings.targetType;
 				dst.targetPath = psettings.targetPath;
 				dst.targetName = psettings.targetName;
@@ -300,13 +302,15 @@
 		Package[string] installed;
 		installed[m_main.name] = m_main;
 		foreach(ref Package p; m_dependencies) {
-			if( auto ppo = p.name in installed ){
+			auto pbase = p.basePackage;
+			auto pexist = installed.get(pbase.name, null);
+			if (pexist && pexist !is pbase){
 				logError("The same package is referenced in different paths:");
-				logError("  %s %s: %s", ppo.name, ppo.vers, ppo.path.toNativeString());
-				logError("  %s %s: %s", p.name, p.vers, p.path.toNativeString());
+				logError("  %s %s: %s", pexist.name, pexist.vers, pexist.path.toNativeString());
+				logError("  %s %s: %s", pbase.name, pbase.vers, pbase.path.toNativeString());
 				throw new Exception("Conflicting package multi-references.");
 			}
-			installed[p.name] = p;
+			installed[pbase.name] = pbase;
 		}
 
 		// Check against installed and add install actions