diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index f38a04194..ab5a3bf32 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -127,7 +127,7 @@ backend lint:
     - *stack-cache
   script:
     - "ls -a ." # TODO: debug only
-    - "nix shell .#gnumake .#stack .#tzdata --command \"prepare-env && make backend-lint-prod\""
+    - "nix shell .#gnumake .#stack .#tzdata --command 'prepare-env && make backend-lint-prod'"
   before_script: *nix-before
   needs:
     - job: backend dependencies