diff --git a/.travis.yml b/.travis.yml
index a4d492d..e319bee 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -12,5 +12,5 @@ services:
 
 script:
  - export PATH="$PATH:$HOME/.dotnet/tools"
- - dotnet tool install --global FlubuCore.GlobalTool --version 4.3.5
- - flubu build tests -s=build/BuildScript.cs
\ No newline at end of file
+ - dotnet tool install --global FlubuCore.GlobalTool --version 4.3.7
+ - flubu build tests
\ No newline at end of file
diff --git a/appveyor.yml b/appveyor.yml
index e7e3d0b..4df4474 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -7,7 +7,7 @@ environment:
 services:
   - mysql
 before_build:
-  - ps: dotnet tool install --global FlubuCore.GlobalTool --version 4.3.5
+  - ps: dotnet tool install --global FlubuCore.GlobalTool --version 4.3.7
 build_script:
   - ps: flubu
 test: off
diff --git a/build/BuildScript.Version.cs b/build/BuildScript.Version.cs
index 6a993f7..aed224f 100644
--- a/build/BuildScript.Version.cs
+++ b/build/BuildScript.Version.cs
@@ -1,4 +1,5 @@
 using System;
+using System.IO;
 using System.Xml;
 using FlubuCore.Context;
 using FlubuCore.Scripting.Attributes;
@@ -10,7 +11,7 @@ namespace BuildScript
     {
         public BuildVersion FetchBuildVersion(ITaskContext context)
         {
-            var content = System.IO.File.ReadAllText("./build/version.props");
+            var content = System.IO.File.ReadAllText(RootDirectory.CombineWith("build/version.props"));
 
             XmlDocument doc = new XmlDocument();
             doc.LoadXml(content);
@@ -28,22 +29,20 @@ namespace BuildScript
             if (!context.BuildSystems().IsLocalBuild)
             {
                 isCi = true;
-                //// todo use flubu build system when available.
-                var appveyortag = context.GetEnvironmentVariable("APPVEYOR_REPO_TAG");
-                bool isTagAppveyor = !string.IsNullOrEmpty(appveyortag) && appveyortag.Equals("true", StringComparison.OrdinalIgnoreCase);
+                bool isTagAppveyor = context.BuildSystems().AppVeyor().IsTag;
              
-                if ((context.BuildSystems().RunningOn == BuildSystemType.AppVeyor && isTagAppveyor) ||
-                    (context.BuildSystems().RunningOn == BuildSystemType.TravisCI && string.IsNullOrWhiteSpace(context.BuildSystems().Travis().TagName)))
+                if (context.BuildSystems().RunningOn == BuildSystemType.AppVeyor && isTagAppveyor ||
+                    context.BuildSystems().RunningOn == BuildSystemType.TravisCI && string.IsNullOrWhiteSpace(context.BuildSystems().Travis().TagName))
                 {
                     isTagged = true;
                 }
             }
 
-
             if (!isTagged)
             {
                 suffix += (isCi ? "preview-" : "dv-") + CreateStamp();
             }
+
             suffix = string.IsNullOrWhiteSpace(suffix) ? null : suffix;
 
             var version = new BuildVersion(int.Parse(versionMajor), int.Parse(versionMinor), int.Parse(versionPatch), versionQuality);
diff --git a/build/BuildScript.cs b/build/BuildScript.cs
index 241d57f..be7f0fa 100644
--- a/build/BuildScript.cs
+++ b/build/BuildScript.cs
@@ -9,7 +9,7 @@ namespace BuildScript
     [Include("./build/BuildVersion.cs")]
     public partial class BuildScript : DefaultBuildScript
     {
-        private const string ArtifactsDir = "./artifacts";
+        protected string ArtifactsDir => RootDirectory.CombineWith("artifacts");
 
         [FromArg("c|configuration")]
         public string Configuration { get; set; }
@@ -29,27 +29,30 @@ namespace BuildScript
         protected override void BeforeBuildExecution(ITaskContext context)
         {
             BuildVersion = FetchBuildVersion(context);
-            TestProjectFiles = context.GetFiles("./test", "*/*.csproj");
-            ProjectFiles = context.GetFiles("./src", "*/*.csproj");
+            TestProjectFiles = context.GetFiles(RootDirectory.CombineWith("test"), "*/*.csproj");
+            ProjectFiles = context.GetFiles(RootDirectory.CombineWith("src"), "*/*.csproj");
         }
 
         protected override void ConfigureTargets(ITaskContext context)
         {
             var clean = context.CreateTarget("Clean")
-                .SetDescription("")
+                .SetDescription("Cleans the output of all projects in the solution.")
                 .AddCoreTask(x => x.Clean()
                     .AddDirectoryToClean(ArtifactsDir, true));
 
             var restore = context.CreateTarget("Restore")
+                .SetDescription("Restores the dependencies and tools of all projects in the solution.")
                 .DependsOn(clean)
                 .AddCoreTask(x => x.Restore());
 
             var build = context.CreateTarget("Build")
+                .SetDescription("Builds all projects in the solution.")
                 .DependsOn(restore)
                 .AddCoreTask(x => x.Build()
                     .InformationalVersion(BuildVersion.VersionWithSuffix()));
 
             var tests = context.CreateTarget("Tests")
+                .SetDescription("Runs all Cap tests.")
                 .ForEach(TestProjectFiles,
                     (projectFile, target) =>
                     {
@@ -59,17 +62,19 @@ namespace BuildScript
                     });
 
           var pack = context.CreateTarget("Pack")
+              .SetDescription("Creates nuget packages for Cap.")
                 .ForEach(ProjectFiles, (projectFile, target) =>
                 {
                     target.AddCoreTask(x => x.Pack()
                         .NoBuild()
                         .Project(projectFile)
                         .IncludeSymbols()
-                        .When(() => !string.IsNullOrEmpty(BuildVersion.Suffix), t => t.VersionSufix(BuildVersion.Suffix))
+                        .VersionSuffix(BuildVersion.Suffix)
                         .OutputDirectory(ArtifactsDir));
                 });
 
           context.CreateTarget("Default")
+              .SetDescription("Runs all targets.")
               .SetAsDefault()
               .DependsOn(clean, restore, build, tests, pack);
         }
diff --git a/build/BuildScript.csproj b/build/BuildScript.csproj
index 19041b5..44dc6cc 100644
--- a/build/BuildScript.csproj
+++ b/build/BuildScript.csproj
@@ -9,7 +9,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="FlubuCore" Version="4.3.5" />
+    <PackageReference Include="FlubuCore" Version="4.3.7" />
   </ItemGroup>
 
 </Project>