diff --git a/pkgs/by-name/ch/chafa/package.nix b/pkgs/by-name/ch/chafa/package.nix
index f77e5e66f7fb..2a145af02630 100644
--- a/pkgs/by-name/ch/chafa/package.nix
+++ b/pkgs/by-name/ch/chafa/package.nix
@@ -22,6 +22,7 @@ stdenv.mkDerivation (finalAttrs: {
   version = "1.18.2";
   pname = "chafa";
 
+  __structuredAttrs = true;
   strictDeps = true;
 
   src = fetchFromGitHub {
@@ -61,7 +62,7 @@ stdenv.mkDerivation (finalAttrs: {
   patches = [ ./xmlcatalog_patch.patch ];
 
   preConfigure = ''
-    substituteInPlace ./autogen.sh --replace pkg-config '$PKG_CONFIG'
+    substituteInPlace ./autogen.sh --replace-fail pkg-config '$PKG_CONFIG'
     NOCONFIGURE=1 ./autogen.sh
   '';