diff --git a/pkgs/development/tools/continuous-integration/woodpecker/common.nix b/pkgs/development/tools/continuous-integration/woodpecker/common.nix
index b273b913b255..1bb8d45f7c44 100644
--- a/pkgs/development/tools/continuous-integration/woodpecker/common.nix
+++ b/pkgs/development/tools/continuous-integration/woodpecker/common.nix
@@ -21,8 +21,8 @@ in
         mv -- "$f" "woodpecker"
         # Issue a warning to the user if they call the deprecated executable
         cat >woodpecker-cli << EOF
-    #/bin/sh
-    echo 'WARNING: calling `woodpecker-cli` is deprecated, use `woodpecker` instead.' >&2
+    #!/bin/sh
+    echo 'WARNING: calling \`woodpecker-cli\` is deprecated, use \`woodpecker\` instead.' >&2
     $out/bin/woodpecker "\$@"
     EOF
         chmod +x woodpecker-cli