5 files changed, 9 insertions, 19 deletions
diff --git a/pkgs/development/interpreters/clojure/clooj.nix b/pkgs/development/interpreters/clojure/clooj.nix
index 810d783d4fb..42d6d67ee15 100644
--- a/pkgs/development/interpreters/clojure/clooj.nix
+++ b/pkgs/development/interpreters/clojure/clooj.nix
@@ -1,14 +1,12 @@
 { lib, stdenv, fetchurl, jre, makeWrapper }:
 
-let version = "0.4.4"; in
-
-stdenv.mkDerivation {
+stdenv.mkDerivation rec {
   pname = "clooj";
-  inherit version;
+  version = "0.4.4";
 
   jar = fetchurl {
     # mirrored as original mediafire.com source does not work without user interaction
-    url = "https://archive.org/download/clooj-0.4.4-standalone/clooj-0.4.4-standalone.jar";
+    url = "https://archive.org/download/clooj-${version}-standalone/clooj-${version}-standalone.jar";
     sha256 = "0hbc29bg2a86rm3sx9kvj7h7db9j0kbnrb706wsfiyk3zi3bavnd";
   };
 
diff --git a/pkgs/development/interpreters/eff/default.nix b/pkgs/development/interpreters/eff/default.nix
index 8dba500c15b..cddb773ec16 100644
--- a/pkgs/development/interpreters/eff/default.nix
+++ b/pkgs/development/interpreters/eff/default.nix
@@ -1,11 +1,8 @@
 { lib, stdenv, fetchFromGitHub, which, ocamlPackages }:
 
-let version = "5.0"; in
-
-stdenv.mkDerivation {
-
+stdenv.mkDerivation rec {
   pname = "eff";
-  inherit version;
+  version = "5.0";
 
   src = fetchFromGitHub {
     owner = "matijapretnar";
diff --git a/pkgs/development/interpreters/gnu-apl/default.nix b/pkgs/development/interpreters/gnu-apl/default.nix
index 108da08b80d..0f666dd9af5 100644
--- a/pkgs/development/interpreters/gnu-apl/default.nix
+++ b/pkgs/development/interpreters/gnu-apl/default.nix
@@ -36,7 +36,6 @@ stdenv.mkDerivation rec {
     license     = licenses.gpl3Plus;
     maintainers = [ maintainers.kovirobi ];
     platforms   = with platforms; linux ++ darwin;
-    inherit version;
     mainProgram = "apl";
 
     longDescription = ''
diff --git a/pkgs/development/interpreters/pyrex/0.9.5.nix b/pkgs/development/interpreters/pyrex/0.9.5.nix
index a9c71c6fcf7..3fb909b0bb0 100644
--- a/pkgs/development/interpreters/pyrex/0.9.5.nix
+++ b/pkgs/development/interpreters/pyrex/0.9.5.nix
@@ -1,10 +1,8 @@
 { lib, fetchurl, python2Packages }:
 
-let version = "0.9.5.1.1"; in
-
-python2Packages.buildPythonPackage {
+python2Packages.buildPythonPackage rec {
   pname = "pyrex";
-  inherit version;
+  version = "0.9.5.1.1";
 
   src = fetchurl {
     url = "https://www.cosc.canterbury.ac.nz/greg.ewing/python/Pyrex/oldtar/Pyrex-${version}.tar.gz";
diff --git a/pkgs/development/interpreters/pyrex/0.9.6.nix b/pkgs/development/interpreters/pyrex/0.9.6.nix
index 12429c05fe6..e9d8d309709 100644
--- a/pkgs/development/interpreters/pyrex/0.9.6.nix
+++ b/pkgs/development/interpreters/pyrex/0.9.6.nix
@@ -1,10 +1,8 @@
 { lib, fetchurl, python2Packages }:
 
-let version = "0.9.6.4"; in
-
-python2Packages.buildPythonPackage {
+python2Packages.buildPythonPackage rec {
   pname = "pyrex";
-  inherit version;
+  version = "0.9.6.4";
 
   src = fetchurl {
     url = "https://www.cosc.canterbury.ac.nz/greg.ewing/python/Pyrex/oldtar/Pyrex-${version}.tar.gz";