diff --git a/pkgs/tools/package-management/apkg/default.nix b/pkgs/tools/package-management/apkg/default.nix
index 121f06ba89d2..ebd1e15909f2 100644
--- a/pkgs/tools/package-management/apkg/default.nix
+++ b/pkgs/tools/package-management/apkg/default.nix
@@ -14,6 +14,17 @@ python3Packages.buildPythonApplication rec {
     sha256 = "duZz2Kwjgek5pMJTDH8gMZAZ13uFwaIYT5E1brW7I7U=";
   };
 
+  # TODO: solve this properly.  Detection won't work anymore.
+  postPatch = ''
+    patch <<-EOF
+      --- a/setup.py
+      +++ b/setup.py
+      @@ -25,1 +25,1 @@
+      -    version=version,
+      +    version='${version}',
+    EOF
+  '';
+
   propagatedBuildInputs = with python3Packages; [
     # copy&pasted requirements.txt (almost exactly)
     beautifulsoup4   # upstream version detection