diff --git a/pkgs/tools/graphics/diagrams-builder/default.nix b/pkgs/tools/graphics/diagrams-builder/default.nix
index b88e4e517364..d066657ff0eb 100644
--- a/pkgs/tools/graphics/diagrams-builder/default.nix
+++ b/pkgs/tools/graphics/diagrams-builder/default.nix
@@ -35,8 +35,7 @@ stdenv.mkDerivation {
 
   nativeBuildInputs = [ makeWrapper ];
 
-  buildCommand = with lib;
-    concatStringsSep "\n" (map exeWrapper backends);
+  buildCommand = lib.concatStringsSep "\n" (map exeWrapper backends);
 
   # Will be faster to build the wrapper locally then to fetch it from a binary cache.
   preferLocalBuild = true;