No need for multiple variables to be set with MyGet buildservices.

Author: maartenba

GitVersionCore/BuildServers/MyGet.cs

@@ -33,8 +33,7 @@ public override string[] GenerateSetParameterMessage(string name, string value)
         {
             return new[]
             {
-                string.Format("##teamcity[setParameter name='GitVersion.{0}' value='{1}']", name, EscapeValue(value)),
-                string.Format("##teamcity[setParameter name='system.GitVersion.{0}' value='{1}']", name, EscapeValue(value))
+                string.Format("##teamcity[setParameter name='GitVersion.{0}' value='{1}']", name, EscapeValue(value))
             };
         }
 

GitVersionTask.Tests/BuildServers/MyGetTests.cs

@@ -20,7 +20,6 @@ public void EscapeValues()
         var versionBuilder = new MyGet(authentication);
         var message = versionBuilder.GenerateSetParameterMessage("Foo", "0.8.0-unstable568 Branch:'develop' Sha:'ee69bff1087ebc95c6b43aa2124bd58f5722e0cb'");
         Assert.AreEqual("##teamcity[setParameter name='GitVersion.Foo' value='0.8.0-unstable568 Branch:|'develop|' Sha:|'ee69bff1087ebc95c6b43aa2124bd58f5722e0cb|'']", message[0]);
-        Assert.AreEqual("##teamcity[setParameter name='system.GitVersion.Foo' value='0.8.0-unstable568 Branch:|'develop|' Sha:|'ee69bff1087ebc95c6b43aa2124bd58f5722e0cb|'']", message[1]);
     }
 
 }