treewide: remove redundant rec

pkgs/misc/emulators/blastem/default.nix

@@ -2,7 +2,7 @@
 
 let
   vasm =
-    stdenv.mkDerivation rec {
+    stdenv.mkDerivation {
       pname = "vasm";
       version = "1.8c";
       src = fetchFromGitHub {
@@ -18,7 +18,7 @@ let
       '';
     };
 in
-stdenv.mkDerivation rec {
+stdenv.mkDerivation {
   pname = "blastem";
   version = "0.5.1";
   src = fetchurl {

pkgs/misc/emulators/citra/default.nix

@@ -1,6 +1,6 @@
 { stdenv, fetchgit, cmake, SDL2, qtbase, qtmultimedia, boost }:
 
-stdenv.mkDerivation rec { 
+stdenv.mkDerivation { 
   pname = "citra";
   version = "2019-05-25";
 

pkgs/misc/emulators/emulationstation/default.nix

@@ -1,7 +1,7 @@
 { stdenv, fetchFromGitHub, pkgconfig, cmake, curl, boost, eigen
 , freeimage, freetype, libGLU_combined, SDL2, alsaLib, libarchive }:
 
-stdenv.mkDerivation rec {
+stdenv.mkDerivation {
   pname = "emulationstation";
   version = "2.0.1a";
 

pkgs/misc/emulators/kega-fusion/default.nix

@@ -3,7 +3,7 @@
 let
   libPath = lib.makeLibraryPath [ stdenv.cc.cc libGLU glib gtk2 alsaLib libSM libX11 gdk-pixbuf pango libXinerama ];
 
-in stdenv.mkDerivation rec {
+in stdenv.mkDerivation {
   pname = "kega-fusion";
   version = "3.63x";
 

pkgs/misc/emulators/openmsx/default.nix

@@ -6,7 +6,7 @@
 , freetype, tcl, zlib
 }:
 
-stdenv.mkDerivation rec {
+stdenv.mkDerivation {
 
   pname = "openmsx";
   version = "git-2017-11-02";

pkgs/misc/emulators/retroarch/cores.nix

@@ -67,7 +67,7 @@ in with stdenv.lib.licenses;
     buildPhase = "make";
   };
 
-  beetle-pce-fast = let der = (mkLibRetroCore rec {
+  beetle-pce-fast = let der = (mkLibRetroCore {
     core = "mednafen-pce-fast";
     src = fetchRetro {
       repo = "beetle-pce-fast-libretro";
@@ -81,7 +81,7 @@ in with stdenv.lib.licenses;
     name = "beetle-pce-fast-${der.version}";
   };
 
-  beetle-psx = let der = (mkLibRetroCore rec {
+  beetle-psx = let der = (mkLibRetroCore {
     core = "mednafen-psx";
     src = fetchRetro {
       repo = "beetle-psx-libretro";
@@ -95,7 +95,7 @@ in with stdenv.lib.licenses;
     name = "beetle-psx-${der.version}";
   };
 
-  beetle-saturn = let der = (mkLibRetroCore rec {
+  beetle-saturn = let der = (mkLibRetroCore {
     core = "mednafen-saturn";
     src = fetchRetro {
       repo = "beetle-saturn-libretro";
@@ -110,7 +110,7 @@ in with stdenv.lib.licenses;
     meta.platforms = [ "x86_64-linux" ];
   };
 
-  bsnes-mercury = let bname = "bsnes-mercury"; in (mkLibRetroCore rec {
+  bsnes-mercury = let bname = "bsnes-mercury"; in (mkLibRetroCore {
     core = bname + "-accuracy";
     src = fetchRetro {
       repo = bname;
@@ -204,7 +204,7 @@ in with stdenv.lib.licenses;
     license = gpl2;
   };
 
-  genesis-plus-gx = mkLibRetroCore rec {
+  genesis-plus-gx = mkLibRetroCore {
     core = "genesis-plus-gx";
     src = fetchRetro {
       repo = "Genesis-Plus-GX";
@@ -215,7 +215,7 @@ in with stdenv.lib.licenses;
     license = "Non-commercial";
   };
 
-  higan-sfc = (mkLibRetroCore rec {
+  higan-sfc = (mkLibRetroCore {
     core = "higan-sfc";
     src = fetchFromGitLab {
       owner = "higan";
@@ -346,7 +346,7 @@ in with stdenv.lib.licenses;
     buildPhase = "make";
   };
 
-  quicknes = (mkLibRetroCore rec {
+  quicknes = (mkLibRetroCore {
     core = "quicknes";
     src = fetchRetro {
       repo = "QuickNES_Core";

pkgs/misc/emulators/retroarch/kodi-advanced-launchers.nix

@@ -17,7 +17,7 @@ let
 
 in
 
-stdenv.mkDerivation rec {
+stdenv.mkDerivation {
   pname = "kodi-retroarch-advanced-launchers";
   version = "0.2";
 

pkgs/misc/emulators/retrofe/default.nix

@@ -2,7 +2,7 @@
 , python, SDL2, SDL2_image, SDL2_mixer, SDL2_ttf, sqlite, zlib, runtimeShell
 }:
 
-stdenv.mkDerivation rec {
+stdenv.mkDerivation {
   pname = "retrofe";
   version = "0.6.169";
 

pkgs/misc/emulators/rpcs3/default.nix

@@ -9,7 +9,7 @@ let
   majorVersion = "0.0.6";
   gitVersion = "8187-790962425"; # echo $(git rev-list HEAD --count)-$(git rev-parse --short HEAD)
 in
-stdenv.mkDerivation rec {
+stdenv.mkDerivation {
   pname = "rpcs3";
   version = "${majorVersion}-${gitVersion}";