diff --git a/pkgs/development/python-modules/astroid/default.nix b/pkgs/development/python-modules/astroid/default.nix
index d6fda529d5da..59bd0bc7c369 100644
--- a/pkgs/development/python-modules/astroid/default.nix
+++ b/pkgs/development/python-modules/astroid/default.nix
@@ -1,25 +1,35 @@
 { lib
 , buildPythonPackage
-, fetchPypi
+, fetchFromGitHub
 , pythonOlder
 , isPyPy
 , lazy-object-proxy
 , wrapt
 , typed-ast
 , pytestCheckHook
+, setuptools-scm
+, pylint
 }:
 
 buildPythonPackage rec {
   pname = "astroid";
-  version = "2.5.1";
+  version = "2.5.6"; # Check whether the version is compatible with pylint
 
   disabled = pythonOlder "3.6";
 
-  src = fetchPypi {
-    inherit pname version;
-    sha256 = "cfc35498ee64017be059ceffab0a25bedf7548ab76f2bea691c5565896e7128d";
+  src = fetchFromGitHub {
+    owner = "PyCQA";
+    repo = pname;
+    rev = "v${version}";
+    sha256 = "sha256-/nWXzuWkerUDvFT/tJTZuhfju46MAM0cwosVH9BXoY8=";
   };
 
+  SETUPTOOLS_SCM_PRETEND_VERSION=version;
+
+  nativeBuildInputs = [
+    setuptools-scm
+  ];
+
   # From astroid/__pkginfo__.py
   propagatedBuildInputs = [
     lazy-object-proxy
@@ -30,6 +40,10 @@ buildPythonPackage rec {
     pytestCheckHook
   ];
 
+  passthru.tests = {
+    inherit pylint;
+  };
+
   meta = with lib; {
     description = "An abstract syntax tree for Python with inference support";
     homepage = "https://github.com/PyCQA/astroid";
diff --git a/pkgs/development/python-modules/pylint/default.nix b/pkgs/development/python-modules/pylint/default.nix
index 6c2702ef3dbe..ef42bd43239a 100644
--- a/pkgs/development/python-modules/pylint/default.nix
+++ b/pkgs/development/python-modules/pylint/default.nix
@@ -15,13 +15,13 @@
 
 buildPythonPackage rec {
   pname = "pylint";
-  version = "2.7.2";
+  version = "2.7.4";
 
   disabled = pythonOlder "3.6";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0e21d3b80b96740909d77206d741aa3ce0b06b41be375d92e1f3244a274c1f8a";
+    sha256 = "bd38914c7731cdc518634a8d3c5585951302b6e2b6de60fbb3f7a0220e21eeee";
   };
 
   nativeBuildInputs = [
diff --git a/pkgs/tools/compression/zstd/default.nix b/pkgs/tools/compression/zstd/default.nix
index 16504d50dbf4..f87a144f7cc9 100644
--- a/pkgs/tools/compression/zstd/default.nix
+++ b/pkgs/tools/compression/zstd/default.nix
@@ -73,10 +73,10 @@ stdenv.mkDerivation rec {
 
     substituteInPlace ../programs/zstdless \
       --replace "zstdcat" "$bin/bin/zstdcat"
-  '' + lib.optionalString stdenv.isDarwin ''
-    install_name_tool -change @rpath/libzstd.1.dylib $out/lib/libzstd.1.dylib $bin/bin/pzstd
   '' + lib.optionalString buildContrib ''
     cp contrib/pzstd/pzstd $bin/bin/pzstd
+  '' + lib.optionalString stdenv.isDarwin ''
+    install_name_tool -change @rpath/libzstd.1.dylib $out/lib/libzstd.1.dylib $bin/bin/pzstd
   '';
 
   outputs = [ "bin" "dev" ]