diff --git a/eda/nmigen.nix b/eda/nmigen.nix
index b153cd1..c4dee1e 100644
--- a/eda/nmigen.nix
+++ b/eda/nmigen.nix
@@ -1,6 +1,6 @@
 { stdenv, python3Packages, yosys, symbiyosys, yices, git }:
 
-python3Packages.buildPythonPackage {
+python3Packages.buildPythonPackage rec {
   pname = "nmigen";
   version = "0.1rc1";