diff --git a/.github/workflows/runtime.yml b/.github/workflows/runtime.yml
index 91c130f..ddcd9b0 100644
--- a/.github/workflows/runtime.yml
+++ b/.github/workflows/runtime.yml
@@ -2,7 +2,7 @@ name: Runtime image
 
 on:
   push:
-    branches: [master, bench, 311-less-snapshots, update-pantry]
+    branches: [master]
 
 jobs:
   push:
diff --git a/stack.yaml b/stack.yaml
index f53159f..5449ef3 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -14,6 +14,3 @@ extra-deps:
 
 drop-packages:
 - Cabal
-
-nix:
-  shell-file: shell.nix