1 files changed, 9 insertions, 0 deletions
diff --git a/lib/spack/spack/build_environment.py b/lib/spack/spack/build_environment.py
index 84fc58587e..13ee99d177 100644
--- a/lib/spack/spack/build_environment.py
+++ b/lib/spack/spack/build_environment.py
@@ -422,6 +422,11 @@ def set_build_environment_variables(pkg, env, dirty):
 
 def _set_variables_for_single_module(pkg, module):
     """Helper function to set module variables for single module."""
+    # Put a marker on this module so that it won't execute the body of this
+    # function again, since it is not needed
+    marker = '_set_run_already_called'
+    if getattr(module, marker, False):
+        return
 
     jobs = spack.config.get('config:build_jobs') if pkg.parallel else 1
     jobs = min(jobs, multiprocessing.cpu_count())
@@ -489,6 +494,10 @@ def _set_variables_for_single_module(pkg, module):
 
     m.static_to_shared_library = static_to_shared_library
 
+    # Put a marker on this module so that it won't execute the body of this
+    # function again, since it is not needed
+    setattr(m, marker, True)
+
 
 def set_module_variables_for_package(pkg):
     """Populate the module scope of install() with some useful functions.