diff --git a/AlmaLinux9/Dockerfile-spack b/AlmaLinux9/Dockerfile-spack
index 059222e..59e69a1 100644
--- a/AlmaLinux9/Dockerfile-spack
+++ b/AlmaLinux9/Dockerfile-spack
@@ -43,7 +43,5 @@ ARG SPACK_BUILDCACHE
 RUN source /opt/setup_spack.sh && \
     spack compiler find && \
     if [ -n "${SPACK_BUILDCACHE}" ]; then \
-        for buildcache in ${SPACK_BUILDCACHE//:/ }; do \
-            spack mirror add --unsigned local-buildcache "${buildcache}"; \
-        done \
+        spack mirror add --unsigned local-buildcache "${SPACK_BUILDCACHE}"; \
     fi