diff --git a/var/spack/repos/builtin/packages/butterflypack/package.py b/var/spack/repos/builtin/packages/butterflypack/package.py
index 848dbcdfeba..c9726a52aaa 100644
--- a/var/spack/repos/builtin/packages/butterflypack/package.py
+++ b/var/spack/repos/builtin/packages/butterflypack/package.py
@@ -3,6 +3,8 @@
 #
 # SPDX-License-Identifier: (Apache-2.0 OR MIT)
 
+from platform import machine
+
 from spack.package import *
 
 
@@ -74,7 +76,7 @@ def cmake_args(self):
         args.append("-Denable_openmp=%s" % ("ON" if "+openmp" in spec else "OFF"))
         if "%cce" in spec:
             # Assume the proper Cray CCE module (cce) is loaded:
-            craylibs_path = env["CRAYLIBS_" + env["MACHTYPE"].capitalize()]
+            craylibs_path = env["CRAYLIBS_" + machine().upper()]
             env.setdefault("LDFLAGS", "")
             env["LDFLAGS"] += " -Wl,-rpath," + craylibs_path
 
diff --git a/var/spack/repos/builtin/packages/strumpack/package.py b/var/spack/repos/builtin/packages/strumpack/package.py
index fce0c4cd175..a82b3784b49 100644
--- a/var/spack/repos/builtin/packages/strumpack/package.py
+++ b/var/spack/repos/builtin/packages/strumpack/package.py
@@ -3,6 +3,8 @@
 #
 # SPDX-License-Identifier: (Apache-2.0 OR MIT)
 
+from platform import machine
+
 from spack.package import *
 from spack.util.environment import set_env
 
@@ -173,7 +175,7 @@ def cmake_args(self):
 
         if "%cce" in spec:
             # Assume the proper Cray CCE module (cce) is loaded:
-            craylibs_path = env["CRAYLIBS_" + env["MACHTYPE"].capitalize()]
+            craylibs_path = env["CRAYLIBS_" + machine().upper()]
             env.setdefault("LDFLAGS", "")
             env["LDFLAGS"] += " -Wl,-rpath," + craylibs_path