diff --git a/source/dub/commandline.d b/source/dub/commandline.d
index ccb2c7b..8d8b149 100644
--- a/source/dub/commandline.d
+++ b/source/dub/commandline.d
@@ -98,6 +98,11 @@
 		environment["TEMP"] = environment["TEMP"].replace("/", "\\");
 	}
 
+	// special single-file package shebang syntax
+	if (args.length >= 2 && args[1].endsWith(".d")) {
+		args = args[0] ~ ["run", "-q", "--single", args[1], "--"] ~ args[2 ..$];
+	}
+
 	// split application arguments from DUB arguments
 	string[] app_args;
 	auto app_args_idx = args.countUntil("--");
@@ -146,15 +151,8 @@
 	string cmdname;
 	args = common_args.extractRemainingArgs();
 	if (args.length >= 1 && !args[0].startsWith("-")) {
-		if (args[0].endsWith(".d")) {
-			cmdname = "run";
-			if (app_args.length) app_args = args[1 .. $] ~ "--" ~ app_args;
-			else app_args = args[1 .. $];
-			args = ["--single", args[0]];
-		} else {
-			cmdname = args[0];
-			args = args[1 .. $];
-		}
+		cmdname = args[0];
+		args = args[1 .. $];
 	} else {
 		if (options.help) {
 			showHelp(commands, common_args);
diff --git a/source/dub/dub.d b/source/dub/dub.d
index e27aea7..1ea03f8 100644
--- a/source/dub/dub.d
+++ b/source/dub/dub.d
@@ -299,7 +299,12 @@
 		recipe_content = recipe_content[idx+1 .. $];
 
 		auto recipe = parsePackageRecipe(recipe_content, recipe_filename);
+		enforce(recipe.buildSettings.sourceFiles.length == 0, "Single-file packages are not allowed to specify source files.");
+		enforce(recipe.buildSettings.sourcePaths.length == 0, "Single-file packages are not allowed to specify source paths.");
+		enforce(recipe.buildSettings.importPaths.length == 0, "Single-file packages are not allowed to specify import paths.");
 		recipe.buildSettings.sourceFiles[""] = [path.toNativeString()];
+		recipe.buildSettings.sourcePaths[""] = [];
+		recipe.buildSettings.importPaths[""] = [];
 		recipe.buildSettings.mainSourceFile = path.toNativeString();
 		if (recipe.buildSettings.targetType == TargetType.autodetect)
 			recipe.buildSettings.targetType = TargetType.executable;
diff --git a/source/dub/generators/build.d b/source/dub/generators/build.d
index b2d4ae0..3e30acd 100644
--- a/source/dub/generators/build.d
+++ b/source/dub/generators/build.d
@@ -34,6 +34,7 @@
 	private {
 		PackageManager m_packageMan;
 		Path[] m_temporaryFiles;
+		Path m_targetExecutablePath;
 	}
 
 	this(Project project)
@@ -94,9 +95,13 @@
 	override void performPostGenerateActions(GeneratorSettings settings, in TargetInfo[string] targets)
 	{
 		// run the generated executable
-		auto buildsettings = targets[m_project.rootPackage.name].buildSettings;
+		auto buildsettings = targets[m_project.rootPackage.name].buildSettings.dup;
 		if (settings.run && !(buildsettings.options & BuildOption.syntaxOnly)) {
-			auto exe_file_path = getTargetPath(buildsettings, settings);
+			Path exe_file_path;
+			if (!m_targetExecutablePath.length)
+				exe_file_path = getTargetPath(buildsettings, settings);
+			else
+				exe_file_path = m_targetExecutablePath ~ settings.compiler.getTargetFileName(buildsettings, settings.platform);
 			runTarget(exe_file_path, buildsettings, settings.runArgs, settings);
 		}
 	}
@@ -148,7 +153,7 @@
 		auto cwd = Path(getcwd());
 
 		Path target_path;
-		if (settings.tempBuild) target_path = getTempDir() ~ format(".dub/build/%s-%s/%s/", pack.name, pack.version_, build_id);
+		if (settings.tempBuild) m_targetExecutablePath = target_path = getTempDir() ~ format(".dub/build/%s-%s/%s/", pack.name, pack.version_, build_id);
 		else target_path = pack.path ~ format(".dub/build/%s/", build_id);
 
 		if (!settings.force && isUpToDate(target_path, buildsettings, settings, pack, packages, additional_dep_files)) {
@@ -180,7 +185,8 @@
 		cbuildsettings.targetPath = target_path.relativeTo(cwd).toNativeString();
 		buildWithCompiler(settings, cbuildsettings);
 
-		copyTargetFile(target_path, buildsettings, settings);
+		if (!settings.tempBuild)
+			copyTargetFile(target_path, buildsettings, settings);
 
 		return false;
 	}