diff --git a/build/ContinuousIntegration/TeamCity/on-checkin.proj b/build/ContinuousIntegration/TeamCity/on-checkin.proj
index 84ad037a..2bd2af6f 100644
--- a/build/ContinuousIntegration/TeamCity/on-checkin.proj
+++ b/build/ContinuousIntegration/TeamCity/on-checkin.proj
@@ -6,7 +6,7 @@
    
   <Target Name="Test">
     <Gallio.MSBuildTasks.Gallio ContinueOnError="False" IgnoreFailures="False" Files="../../../src/UnitTests/bin/Release/MathNet.Numerics.UnitTests.dll" />
-    <Exec Command="../../../src/FSharpUnitTests/bin/Release/FSharpUnitTests.exe" IgnoreExitCode="false" />
+    <Exec Command="$(MSBuildProjectDirectory)/../../../src/FSharpUnitTests/bin/Release/FSharpUnitTests.exe" IgnoreExitCode="false" />
   </Target>
   
   <Target Name="StyleCop">