Changed the build process

.gitignore

@@ -12,3 +12,4 @@ build
 *.framework
 _._
 externals
+artifacts

azure-pipelines.yml

@@ -88,7 +88,7 @@ jobs:
           dotnet tool install -g cake.tool --version $(CAKE_VERSION)
         displayName: 'Install .NET Core global tools'
       - powershell: |
-          dotnet-cake --target=build --verbosity=$(VERBOSITY)
+          dotnet-cake --target=build --sdks=$(SdksNames) --verbosity=$(VERBOSITY)
         displayName: 'Run build'
       - powershell: |
           if (Get-ChildItem artifacts -Filter *.nupkg) {

build.cake

@@ -145,14 +145,13 @@ Task ("libs")
 	CleanVisualStudioSolution ();
 	RestoreVisualStudioSolution ();
 
-	var targets = $@"source\\{string.Join (@";source\\", SOURCES_TARGETS)}";
-
-	MSBuild(SOLUTION_PATH, c => {
-		c.Configuration = "Release";
-		c.MaxCpuCount = 0;
-		c.Targets.Clear();
-		c.Targets.Add(targets);
-	});
+	foreach (var target in SOURCES_TARGETS)
+		MSBuild(SOLUTION_PATH, c => {
+			c.Configuration = "Release";
+			c.MaxCpuCount = 0;
+			c.Targets.Clear();
+			c.Targets.Add($@"source\\{target}");
+		});
 });
 
 Task ("samples")
@@ -174,16 +173,14 @@ Task ("nuget")
 {
 	EnsureDirectoryExists("./artifacts");
 
-	var targets = $@"source\\{string.Join (@":Pack;source\\", SOURCES_TARGETS)}:Pack";
-
-	MSBuild(SOLUTION_PATH, c => {
-		c.Configuration = "Release";
-		c.Restore = true;
-		c.MaxCpuCount = 0;
-		c.Targets.Clear();
-		c.Targets.Add(targets);
-		c.Properties.Add("PackageOutputPath", new [] { "../../../artifacts/" });
-	});
+	foreach (var target in SOURCES_TARGETS)
+		MSBuild(SOLUTION_PATH, c => {
+			c.Configuration = "Release";
+			c.MaxCpuCount = 0;
+			c.Targets.Clear();
+			c.Targets.Add($@"source\\{target}:Pack");
+			c.Properties.Add("PackageOutputPath", new [] { "../../../artifacts/" });
+		});
 });
 
 Task ("clean")