diff --git a/pkgs/development/python-modules/formencode/default.nix b/pkgs/development/python-modules/formencode/default.nix
index 216e48dd1ff2..ab90f40faff4 100644
--- a/pkgs/development/python-modules/formencode/default.nix
+++ b/pkgs/development/python-modules/formencode/default.nix
@@ -1,11 +1,12 @@
 {
   lib,
   buildPythonPackage,
-  isPy27,
+  pythonOlder,
   fetchPypi,
   setuptools-scm,
   six,
   dnspython,
+  legacy-cgi,
   pycountry,
   pytestCheckHook,
 }:
@@ -13,9 +14,9 @@
 buildPythonPackage rec {
   pname = "formencode";
   version = "2.1.0";
-  format = "setuptools";
+  pyproject = true;
 
-  disabled = isPy27;
+  disabled = pythonOlder "3.7";
 
   src = fetchPypi {
     pname = "FormEncode";
@@ -27,9 +28,12 @@ buildPythonPackage rec {
     sed -i '/setuptools_scm_git_archive/d' setup.py
   '';
 
-  nativeBuildInputs = [ setuptools-scm ];
+  build-system = [ setuptools-scm ];
 
-  propagatedBuildInputs = [ six ];
+  dependencies = [
+    six
+    legacy-cgi
+  ];
 
   nativeCheckInputs = [
     dnspython
@@ -43,10 +47,10 @@ buildPythonPackage rec {
     "test_unicode_ascii_subgroup"
   ];
 
-  meta = with lib; {
+  meta = {
     description = "FormEncode validates and converts nested structures";
     homepage = "http://formencode.org";
-    license = licenses.mit;
+    license = lib.licenses.mit;
     maintainers = [ ];
   };
 }