diff --git a/env/sles15/x86_64/sysconfigs/packages.yaml b/env/sles15/x86_64/sysconfigs/packages.yaml
index 87b0e48..859e0f7 100644
--- a/env/sles15/x86_64/sysconfigs/packages.yaml
+++ b/env/sles15/x86_64/sysconfigs/packages.yaml
@@ -145,6 +145,11 @@ packages:
     require: '%gcc@7.5.0'
   m4:
     require: '%gcc@7.5.0'
+  munge:
+    buildable: false
+    externals:
+      - prefix: /usr
+        spec: munge@0.5.15
   ncurses:
     require: '%gcc@7.5.0'
   netcdf-c: