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-rw-r--r--tools/nixery/.travis.yml2
-rw-r--r--tools/nixery/default.nix6
2 files changed, 5 insertions, 3 deletions
diff --git a/tools/nixery/.travis.yml b/tools/nixery/.travis.yml
index 72b2a657b34b..b0a2b3f997f9 100644
--- a/tools/nixery/.travis.yml
+++ b/tools/nixery/.travis.yml
@@ -15,7 +15,7 @@ before_script:
   - cachix use nixery
 script:
   - test -z $(gofmt -l server/ build-image/)
-  - nix-build | cachix push nixery
+  - nix-build --arg maxLayers 1 | cachix push nixery
 
   # This integration test makes sure that the container image built
   # for Nixery itself runs fine in Docker, and that images pulled
diff --git a/tools/nixery/default.nix b/tools/nixery/default.nix
index af1ec904bf25..44ac7313adc7 100644
--- a/tools/nixery/default.nix
+++ b/tools/nixery/default.nix
@@ -14,7 +14,8 @@
 
 { pkgs ? import <nixpkgs> { }
 , preLaunch ? ""
-, extraPackages ? [] }:
+, extraPackages ? []
+, maxLayers ? 20 }:
 
 with pkgs;
 
@@ -92,7 +93,8 @@ in rec {
   in dockerTools.buildLayeredImage {
     name = "nixery";
     config.Cmd = [ "${nixery-launch-script}/bin/nixery" ];
-    maxLayers = 96;
+
+    inherit maxLayers;
     contents = [
       bashInteractive
       cacert