diff --git a/pkgs/by-name/ap/apt-offline/package.nix b/pkgs/by-name/ap/apt-offline/package.nix
index 124aadf1acb2..ba34dec6c0f8 100644
--- a/pkgs/by-name/ap/apt-offline/package.nix
+++ b/pkgs/by-name/ap/apt-offline/package.nix
@@ -23,10 +23,10 @@ python3Packages.buildPythonApplication {
 
   postPatch = ''
     substituteInPlace org.debian.apt.aptoffline.policy \
-      --replace /usr/bin/ "$out/bin"
+      --replace-fail /usr/bin/ "$out/bin"
 
     substituteInPlace apt_offline_core/AptOfflineCoreLib.py \
-      --replace /usr/bin/gpgv "${lib.getBin gnupg}/bin/gpgv"
+      --replace-fail /usr/bin/gpgv "${lib.getBin gnupg}/bin/gpgv"
   '';
 
   postInstall = ''