diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 30c3e66..b6a2991 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -28,7 +28,7 @@ dockerimage:
   tags:
     - fablab
 
-squashfs:
+.squashfs_template: &squashfs_template
   stage: build
   script:
    - make images/debian-stretch.squashfs
@@ -41,3 +41,17 @@ squashfs:
     expire_in: 2 weeks
   tags:
     - fablab
+
+squashfs_featurebranch:
+  <<: *squashfs_template
+  variables:
+    COMPRESSION_LEVEL: 5
+  except:
+    - master
+
+squashfs_master:
+  <<: *squashfs_template
+  variables:
+    COMPRESSION_LEVEL: 7
+  only:
+    - master