diff --git a/pkgs/development/python-modules/aiopyarr/default.nix b/pkgs/development/python-modules/aiopyarr/default.nix
index 690262dd93aa..50e7ec06d51c 100644
--- a/pkgs/development/python-modules/aiopyarr/default.nix
+++ b/pkgs/development/python-modules/aiopyarr/default.nix
@@ -27,7 +27,7 @@ buildPythonPackage rec {
 
   postPatch = ''
     substituteInPlace setup.py \
-      --replace 'version="master"' 'version="${version}"'
+      --replace-fail 'version="master"' 'version="${version}"'
   '';
 
   dependencies = [