diff --git a/pkgs/development/python-modules/ansiwrap/default.nix b/pkgs/development/python-modules/ansiwrap/default.nix
index 49cf4a63ba63..3dc3a8df13be 100644
--- a/pkgs/development/python-modules/ansiwrap/default.nix
+++ b/pkgs/development/python-modules/ansiwrap/default.nix
@@ -1,16 +1,18 @@
 { lib
 , ansicolors
 , buildPythonPackage
-, coverage
 , fetchPypi
-, pytest-cov
 , pytestCheckHook
+, pythonOlder
 , textwrap3
 }:
 
 buildPythonPackage rec {
   pname = "ansiwrap";
   version = "0.8.4";
+  format = "setuptools";
+
+  disabled = pythonOlder "3.7";
 
   src = fetchPypi {
     inherit pname version;
@@ -18,21 +20,31 @@ buildPythonPackage rec {
     sha256 = "ca0c740734cde59bf919f8ff2c386f74f9a369818cdc60efe94893d01ea8d9b7";
   };
 
-  nativeCheckInputs = [
+  postPatch = ''
+    # https://github.com/jonathaneunice/ansiwrap/issues/18
+    substituteInPlace test/test_ansiwrap.py \
+      --replace "set(range(20, 120)).difference(LINE_LENGTHS)" "sorted(set(range(20, 120)).difference(LINE_LENGTHS))" \
+      --replace "set(range(120, 400)).difference(LINE_LENGTHS)" "sorted(set(range(120, 400)).difference(LINE_LENGTHS))"
+  '';
+
+  checkInputs = [
     ansicolors
-    coverage
-    pytest-cov
     pytestCheckHook
   ];
 
-  propagatedBuildInputs = [ textwrap3 ];
+  propagatedBuildInputs = [
+    textwrap3
+  ];
 
-  pythonImportsCheck = [ "ansiwrap" ];
+  pythonImportsCheck = [
+    "ansiwrap"
+  ];
 
   meta = with lib; {
     description = "Textwrap, but savvy to ANSI colors and styles";
     homepage = "https://github.com/jonathaneunice/ansiwrap";
+    changelog = "https://github.com/jonathaneunice/ansiwrap/blob/master/CHANGES.yml";
     license = licenses.asl20;
-    maintainers = [ maintainers.costrouc ];
+    maintainers = with maintainers; [ costrouc ];
   };
 }