diff --git a/pkgs/build-support/replace-dependency.nix b/pkgs/build-support/replace-dependency.nix
index c8794c6eea1e..4ac47f9a9f28 100644
--- a/pkgs/build-support/replace-dependency.nix
+++ b/pkgs/build-support/replace-dependency.nix
@@ -80,4 +80,4 @@ let
 
   drvHash = discard (toString drv);
 in assert (stringLength (drvName (toString oldDependency)) == stringLength (drvName (toString newDependency)));
-rewriteMemo.${drvHash} or (warn "replace-dependency.nix: Derivation ${drvHash} does not depend on ${discard (toString oldDependency)}\n" drv)
+rewriteMemo.${drvHash} or (warn "replace-dependency.nix: Derivation ${drvHash} does not depend on ${discard (toString oldDependency)}" drv)