1 files changed, 4 insertions, 4 deletions
diff --git a/Makefile b/Makefile
index 63287ec..2267e09 100644
--- a/Makefile
+++ b/Makefile
@@ -2,10 +2,10 @@
 # TODO
 #   * support ssh as user instead of root
 #   * testing target
-PACKER     ?= packer
-ANSIBLE_DIR = ansible-roles
+PACKER      ?= packer
+ANSIBLE_DIR ?= ansible-roles
 
-HASHER     ?= sha256sum
+HASHER      ?= sha256sum
 
 
 # check which hypervisors are available
@@ -39,7 +39,7 @@ BOOTTARGETS += $(foreach prov, $(PROVTARGETS), $(prov)/boot)
 
 
 
-PACKER_OPTS := -var-file=base.json
+PACKER_OPTS     += -var-file=base.json
 ifdef DEBUG
     VERBOSE     := 1
     PACKER_OPTS += -debug