diff --git a/var/spack/repos/builtin/packages/gosam-contrib/package.py b/var/spack/repos/builtin/packages/gosam-contrib/package.py
index 416226b693..8a6d12d7c5 100644
--- a/var/spack/repos/builtin/packages/gosam-contrib/package.py
+++ b/var/spack/repos/builtin/packages/gosam-contrib/package.py
@@ -40,3 +40,7 @@ def configure_args(self):
         args += self.enable_or_disable('libs')
 
         return args
+
+    @property
+    def parallel(self):
+        return False
diff --git a/var/spack/repos/builtin/packages/groff/package.py b/var/spack/repos/builtin/packages/groff/package.py
index 3a4afac7d1..ce2cc490bc 100644
--- a/var/spack/repos/builtin/packages/groff/package.py
+++ b/var/spack/repos/builtin/packages/groff/package.py
@@ -58,7 +58,7 @@ class Groff(AutotoolsPackage, GNUMirrorPackage):
 
     @property
     def parallel(self):
-        return self.spec.satisfies('@1.22.4')
+        return False
 
     @classmethod
     def determine_version(cls, exe):