diff --git a/var/spack/repos/builtin/packages/hypre/package.py b/var/spack/repos/builtin/packages/hypre/package.py
index 0e99553293..4b915daa68 100644
--- a/var/spack/repos/builtin/packages/hypre/package.py
+++ b/var/spack/repos/builtin/packages/hypre/package.py
@@ -42,6 +42,9 @@ def install(self, spec, prefix):
 
         if '~internal-superlu' in self.spec:
             configure_args.append("--without-superlu")
+            # MLI and FEI do not build without superlu on Linux
+            configure_args.append("--without-mli")
+            configure_args.append("--without-fei")
 
         # Hypre's source is staged under ./src so we'll have to manually
         # cd into it.
diff --git a/var/spack/repos/builtin/packages/muparser/package.py b/var/spack/repos/builtin/packages/muparser/package.py
index a1a9ff90e5..19ca8ce287 100644
--- a/var/spack/repos/builtin/packages/muparser/package.py
+++ b/var/spack/repos/builtin/packages/muparser/package.py
@@ -14,5 +14,5 @@ def install(self, spec, prefix):
 
         configure(*options)
 
-        make()
+        make(parallel=False)
         make("install")