diff --git a/etc/spack/modules.yaml b/etc/spack/modules.yaml
index 99be5e7b6d88b820c9050145e1df5b271ef4c6eb..5f31cdd5c073e6410f3c3806a0e61a86f2f8882e 100644
--- a/etc/spack/modules.yaml
+++ b/etc/spack/modules.yaml
@@ -22,8 +22,8 @@ modules:
     include:
       - CPATH
     lib/pkgconfig:
-      - PKGCONFIG
+      - PKG_CONFIG_PATH
     lib64/pkgconfig:
-      - PKGCONFIG
+      - PKG_CONFIG_PATH
     '':
       - CMAKE_PREFIX_PATH