diff --git a/nix/pkgs/llvmlite.nix b/nix/pkgs/llvmlite.nix
index a56977dc4..7905dbae8 100644
--- a/nix/pkgs/llvmlite.nix
+++ b/nix/pkgs/llvmlite.nix
@@ -1,9 +1,6 @@
 { stdenv, fetchFromGitHub, llvm-or1k, makeWrapper, python3, ncurses, zlib, python3Packages }:
-let
-version = "0f4ebae";
-in
 stdenv.mkDerivation rec {
-  name = "llvmlite-${version}";
+  name = "llvmlite";
   src = fetchFromGitHub {
     rev = "1d167be4eec5d6c32498952be8b3ac17dd30df8d";
     owner = "m-labs";
diff --git a/nix/pkgs/python3Packages.nix b/nix/pkgs/python3Packages.nix
index f69f38887..f4b16a396 100644
--- a/nix/pkgs/python3Packages.nix
+++ b/nix/pkgs/python3Packages.nix
@@ -2,9 +2,7 @@
 
 rec { 
   asyncserial = python3Packages.buildPythonPackage rec {
-    version = "git-09a9fc";
-    pname = "asyncserial";
-    name = "${pname}-${version}";
+    name = "asyncserial";
 
     src = fetchFromGitHub {
       owner = "m-labs";
@@ -24,9 +22,7 @@ rec {
     };
   };
   misoc = python3Packages.buildPythonPackage rec {
-    version = "git-714ea6";
-    pname = "misoc";
-    name = "${pname}-${version}";
+    name = "misoc";
     
     src = fetchFromGitHub {
       owner = "m-labs";
@@ -49,9 +45,7 @@ rec {
     };
   };
   migen = python3Packages.buildPythonPackage rec {
-    version = "git-3d8a58";
-    pname = "migen";
-    name = "${pname}-${version}";
+    name = "migen";
 
     src = fetchFromGitHub {
       owner = "m-labs";
@@ -74,9 +68,7 @@ rec {
     };
   };
   microscope = python3Packages.buildPythonPackage rec {
-    version = "git-02cffc";
-    pname = "microscope";
-    name = "${pname}-${version}";
+    name = "microscope";
 
     src = fetchFromGitHub {
       owner = "m-labs";
@@ -95,9 +87,7 @@ rec {
     };
   };
   jesd204b = python3Packages.buildPythonPackage rec {
-    version = "git-02cffc";
-    pname = "jesd204b";
-    name = "${pname}-${version}";
+    name = "jesd204b";
 
     src = fetchFromGitHub {
       owner = "m-labs";