diff --git a/spack-environment/Makefile b/spack-environment/Makefile
index c3147e91ca0191d6126bc93470f63df2cad33422..3b6461d27263fe56ff4acfd7fa1a7dd7f57fd320 100644
--- a/spack-environment/Makefile
+++ b/spack-environment/Makefile
@@ -25,8 +25,8 @@ $(SPACK_ENV)/push: $(addprefix $(SPACK_ENV)/push/,$($(SPACK_ENV)/SPACK_PACKAGE_I
 
 $(SPACK_ENV)/push/%: $(SPACK_ENV)/install/%
 	@mkdir -p $(dir $@)
-	$(foreach buildcache, $(BUILDCACHE_DIR), $(SPACK) buildcache create --allow-root --only=package --unsigned $(buildcache) /$(HASH) ;) # push $(SPEC)
-	$(foreach buildcache, $(BUILDCACHE_MIRROR), $(SPACK) buildcache create --allow-root --only=package --unsigned $(buildcache) /$(HASH) ;) # push $(SPEC)
+	$(foreach buildcache, $(BUILDCACHE_DIR), $(SPACK) buildcache create --allow-root --only=package --unsigned --directory $(buildcache) /$(HASH) ;) # push $(SPEC)
+	$(foreach buildcache, $(BUILDCACHE_MIRROR), $(SPACK) buildcache create --allow-root --only=package --unsigned --mirror-name $(buildcache) /$(HASH) ;) # push $(SPEC)
 	@touch $@
 
 $(SPACK_ENV)/spack.lock: $(SPACK_ENV)/spack.yaml Makefile