diff --git a/pkgs/by-name/ed/edlib/package.nix b/pkgs/by-name/ed/edlib/package.nix
index 7042a92b8caf..9358ca49435c 100644
--- a/pkgs/by-name/ed/edlib/package.nix
+++ b/pkgs/by-name/ed/edlib/package.nix
@@ -5,15 +5,15 @@
   cmake,
 }:
 
-stdenv.mkDerivation {
+stdenv.mkDerivation (finalAttrs: {
   pname = "edlib";
-  version = "unstable-2021-08-20";
+  version = "1.3.9.post1";
 
   src = fetchFromGitHub {
     owner = "Martinsos";
     repo = "edlib";
-    rev = "f8afceb49ab0095c852e0b8b488ae2c88e566afd";
-    hash = "sha256-P/tFbvPBtA0MYCNDabW+Ypo3ltwP4S+6lRDxwAZ1JFo=";
+    tag = finalAttrs.version;
+    hash = "sha256-XejxohLVdBBzpYZ//OpqC1ActmCaZ8tunJyhOYtZmKQ=";
   };
 
   nativeBuildInputs = [ cmake ];
@@ -25,11 +25,11 @@ stdenv.mkDerivation {
     runHook postCheck
   '';
 
-  meta = with lib; {
+  meta = {
     homepage = "https://martinsos.github.io/edlib";
     description = "Lightweight, fast C/C++ library for sequence alignment using edit distance";
-    maintainers = with maintainers; [ bcdarwin ];
-    license = licenses.mit;
-    platforms = platforms.unix;
+    maintainers = with lib.maintainers; [ bcdarwin ];
+    license = lib.licenses.mit;
+    platforms = lib.platforms.unix;
   };
-}
+})
diff --git a/pkgs/development/python-modules/edlib/default.nix b/pkgs/development/python-modules/edlib/default.nix
index 5a16cd6e023f..2a464b1565b3 100644
--- a/pkgs/development/python-modules/edlib/default.nix
+++ b/pkgs/development/python-modules/edlib/default.nix
@@ -4,14 +4,17 @@
   edlib,
   cython,
   python,
+  setuptools,
 }:
 
 buildPythonPackage {
-  inherit (edlib) pname src meta;
-  version = "1.3.9";
-  format = "setuptools";
-
-  disabled = pythonOlder "3.6";
+  inherit (edlib)
+    pname
+    src
+    version
+    meta
+    ;
+  pyproject = true;
 
   sourceRoot = "${edlib.src.name}/bindings/python";
 
@@ -19,10 +22,14 @@ buildPythonPackage {
     ln -s ${edlib.src}/edlib .
   '';
 
-  EDLIB_OMIT_README_RST = 1;
-  EDLIB_USE_CYTHON = 1;
+  env.EDLIB_OMIT_README_RST = 1;
+  env.EDLIB_USE_CYTHON = 1;
+
+  build-system = [
+    setuptools
+    cython
+  ];
 
-  nativeBuildInputs = [ cython ];
   buildInputs = [ edlib ];
 
   checkPhase = ''