diff --git a/build.sh b/build.sh
index a64ed3a22d..9d4dfee12f 100755
--- a/build.sh
+++ b/build.sh
@@ -43,5 +43,6 @@ if test ! -d $buildFolder; then
     fi
 fi
 
+chmod +x .build/dotnet/dotnet-install.sh
 .build/dotnet/dotnet-install.sh --shared-runtime --channel master --version 1.2.0-beta-001304-00
 $buildFile -r $repoFolder "$@"
\ No newline at end of file