diff --git a/build/RepositoryBuild.targets b/build/RepositoryBuild.targets
index 6457bbf13b..be439fc010 100644
--- a/build/RepositoryBuild.targets
+++ b/build/RepositoryBuild.targets
@@ -119,8 +119,9 @@
 
     <Message Text="============ Building $(RepositoryToBuild) ============" Importance="High" />
 
+    <!-- Remove final slash in $(BuildRepositoryRoot) to avoid problems due to KoreBuild adding one on Windows. -->
     <Exec
-      Command="./$(_BuildScriptToExecute) -Path $(BuildRepositoryRoot) $(BuildArguments)"
+      Command="./$(_BuildScriptToExecute) -Path $(BuildRepositoryRoot.TrimEnd('\\')) $(BuildArguments)"
       IgnoreStandardErrorWarningFormat="true"
       WorkingDirectory="$(RepositoryRoot)"
       IgnoreExitCode="true"
@@ -163,8 +164,9 @@
 
     <Message Text="============ Testing $(RepositoryToBuild) ============" Importance="High" />
 
+    <!-- Remove final slash in $(BuildRepositoryRoot) to avoid problems due to KoreBuild adding one on Windows. -->
     <Exec Condition="'$(SkipTestsDueToMissingSharedFx)' != 'true' "
-      Command="./$(_BuildScriptToExecute) -Path $(BuildRepositoryRoot) $(BuildArguments)"
+      Command="./$(_BuildScriptToExecute) -Path $(BuildRepositoryRoot.TrimEnd('\\')) $(BuildArguments)"
       IgnoreStandardErrorWarningFormat="true"
       WorkingDirectory="$(RepositoryRoot)"
       IgnoreExitCode="true">
diff --git a/korebuild-lock.txt b/korebuild-lock.txt
index 4b446c4553..f879f18f8b 100644
--- a/korebuild-lock.txt
+++ b/korebuild-lock.txt
@@ -1,2 +1,2 @@
-version:2.1.7-build-20190110.2
-commithash:00aefcfd284db33352f35bfa2c74c65f8580e372
+version:2.1.7-build-20200221.1
+commithash:96fb43f7c4a724d7af26b053240182760ac80a9b