diff --git a/zorg/buildbot/builders/ClangBuilder.py b/zorg/buildbot/builders/ClangBuilder.py
--- a/zorg/buildbot/builders/ClangBuilder.py
+++ b/zorg/buildbot/builders/ClangBuilder.py
@@ -519,7 +519,7 @@
                 fortran_flags = [
                         '--cmake-define=TEST_SUITE_FORTRAN:STRING=ON',
                         '--cmake-define=CMAKE_Fortran_FLAGS:STRING=' +
-                            '-flang-experimental-exec -lpgmath',
+                            '-lpgmath',
                         util.Interpolate(
                             '--cmake-define=CMAKE_Fortran_COMPILER=' +
                             '%(prop:builddir)s/'+compiler_path+'/bin/'+fc)]