diff --git a/flake.lock b/flake.lock
index 2762c79b7..4acbe9c75 100644
--- a/flake.lock
+++ b/flake.lock
@@ -60,11 +60,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1693636127,
-        "narHash": "sha256-ZlS/lFGzK7BJXX2YVGnP3yZi3T9OLOEtBCyMJsb91U8=",
+        "lastModified": 1693771906,
+        "narHash": "sha256-32EnPCaVjOiEERZ+o/2Ir7JH9pkfwJZJ27SKHNvt4yk=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "9075cba53e86dc318d159aee55dc9a7c9a4829c1",
+        "rev": "da5adce0ffaff10f6d0fee72a02a5ed9d01b52fc",
         "type": "github"
       },
       "original": {
@@ -108,11 +108,11 @@
     "src-migen": {
       "flake": false,
       "locked": {
-        "lastModified": 1674045327,
-        "narHash": "sha256-oYdeY0MbTReKbAwmSznnqw0wNawdInJoFJVWW3tesFA=",
+        "lastModified": 1693990700,
+        "narHash": "sha256-qJLA03QcZ5S9DrqrseuzIQBTWS7rjAbYJxLYZEQ8rxA=",
         "owner": "m-labs",
         "repo": "migen",
-        "rev": "ccaee68e14d3636e1d8fb2e0864dd89b1b1f7384",
+        "rev": "2cfee3e0db6fdca9b5918686ea77c93252e7cebd",
         "type": "github"
       },
       "original": {
diff --git a/flake.nix b/flake.nix
index 2acbdb65e..a8e740fb8 100644
--- a/flake.nix
+++ b/flake.nix
@@ -190,6 +190,8 @@
       migen = pkgs.python3Packages.buildPythonPackage rec {
         name = "migen";
         src = src-migen;
+        format = "pyproject";
+        nativeBuildInputs = [ pkgs.python3Packages.setuptools ];
         propagatedBuildInputs = [ pkgs.python3Packages.colorama ];
       };