Remove iserv-proxy materialization

Author: hamishmack

overlays/haskell.nix

@@ -1050,7 +1050,6 @@ final: prev: {
 
                 src = sources.iserv-proxy;
 
-                index-state = final.haskell-nix.internalHackageIndexState;
                 modules = [{
                   config = {
                     # Prevent the iserve-proxy-interpreter from depending on itself
@@ -1059,22 +1058,11 @@ final: prev: {
                     setupBuildFlags = final.lib.mkForce [];
                   };
                 }];
-              } // (if __compareVersions final.buildPackages.haskell-nix.compiler.${compiler-nix-name}.version "9.9" < 0
-                then {
-                  materialized =../materialized/iserv-proxy + "/${
-                    if pkgs.stdenv.hostPlatform.isWindows
-                      then "windows"
-                      else if pkgs.stdenv.hostPlatform.isGhcjs
-                        then "ghcjs"
-                          else if pkgs.haskell-nix.haskellLib.isCrossHost
-                            then "cross"
-                            else "default"}/${compiler-nix-name}";
-                }
-                else {
+              } // final.lib.optionalAttrs (__compareVersions final.buildPackages.haskell-nix.compiler.${compiler-nix-name}.version "9.10" > 0) {
                   cabalProjectLocal = ''
                     allow-newer: *:base, *:bytestring
                   '';
-                }))).hsPkgs.iserv-proxy.components.exes;
+                })).hsPkgs.iserv-proxy.components.exes;
             in {
               # We need the proxy for the build system and the interpreter for the target
               inherit (exes final.pkgsBuildBuild) iserv-proxy;