Use custom cabal-install

Fixes #210

Author: angerman

cross-js.nix

@@ -1,7 +1,7 @@
 { self, pkgs, compiler, compiler-nix-name, toolsModule, withHLS ? true, withHlint ? true, withIOG ? true  }:
-let tool-version-map = import ./tool-map.nix;
+let tool-version-map = (import ./tool-map.nix) self;
     tool = tool-name: pkgs.pkgsBuildBuild.haskell-nix.tool compiler-nix-name tool-name [(tool-version-map compiler-nix-name tool-name) toolsModule];
-    cabal-install = pkgs.pkgsBuildBuild.haskell-nix.nix-tools-unchecked.exes.cabal;
+    cabal-install = tool "cabal";
     haskell-tools =
          pkgs.lib.optionalAttrs (withHLS && (compiler-not-in (
            # it appears we can't get HLS build with 9.8 yet.

cross-windows.nix

@@ -1,7 +1,7 @@
 { self, pkgs, compiler, compiler-nix-name, toolsModule, withHLS ? true, withHlint ? true, withIOG ? true  }:
-let tool-version-map = import ./tool-map.nix;
+let tool-version-map = (import ./tool-map.nix) self;
     tool = tool-name: pkgs.pkgsBuildBuild.haskell-nix.tool compiler-nix-name tool-name [(tool-version-map compiler-nix-name tool-name) toolsModule];
-    cabal-install = pkgs.pkgsBuildBuild.haskell-nix.nix-tools-unchecked.exes.cabal;
+    cabal-install = tool "cabal";
     haskell-tools =
          pkgs.lib.optionalAttrs (withHLS && (compiler-not-in (
            # it appears we can't get HLS build with 9.8 yet.

dynamic.nix

@@ -1,8 +1,8 @@
 # define a development shell for dynamically linked applications (default)
 { self, pkgs, compiler, compiler-nix-name, toolsModule, withHLS ? true, withHlint ? true, withIOG ? true, withIOGFull ? false, withGHCTooling ? false }:
-let tool-version-map = import ./tool-map.nix;
+let tool-version-map = (import ./tool-map.nix) self;
     tool = tool-name: pkgs.pkgsBuildBuild.haskell-nix.tool compiler-nix-name tool-name [(tool-version-map compiler-nix-name tool-name) toolsModule];
-    cabal-install = pkgs.pkgsBuildBuild.haskell-nix.nix-tools-unchecked.exes.cabal;
+    cabal-install = tool "cabal";
     haskell-tools =
          pkgs.lib.optionalAttrs (withHLS && (compiler-not-in (
            pkgs.lib.optional (builtins.compareVersions compiler.version "9.7" >= 0) compiler-nix-name

flake.lock

@@ -5,8 +5,10 @@
     inputs.nixpkgs.follows = "haskellNix/nixpkgs-unstable";
     inputs.flake-utils.url = "github:numtide/flake-utils";
     inputs.iohk-nix.url = "github:input-output-hk/iohk-nix";
+    inputs.cabal.url = "github:hsyl20/cabal?ref=hsyl20/per-file-extra-source-options";
+    inputs.cabal.flake = false;
 
-    outputs = { self, nixpkgs, flake-utils, haskellNix, iohk-nix }:
+    outputs = { self, nixpkgs, flake-utils, haskellNix, iohk-nix, ... }:
     let overlays = {
         inherit (iohk-nix.overlays) crypto;
         # add static-$pkg for a few packages to be able to pull them im explicitly.

flake.nix

@@ -1,7 +1,7 @@
 { self, pkgs, compiler, compiler-nix-name, toolsModule, withHLS ? true, withHlint ? true, withIOG ? true, withIOGFull ? false }:
-let tool-version-map = import ./tool-map.nix;
+let tool-version-map = (import ./tool-map.nix) self;
     tool = tool-name: pkgs.pkgsBuildBuild.haskell-nix.tool compiler-nix-name tool-name [(tool-version-map compiler-nix-name tool-name) toolsModule];
-    cabal-install = pkgs.pkgsBuildBuild.haskell-nix.nix-tools-unchecked.exes.cabal;
+    cabal-install = tool "cabal";
     haskell-tools =
         pkgs.lib.optionalAttrs (withHLS && (compiler-not-in (
            pkgs.lib.optional (builtins.compareVersions compiler.version "9.7" >= 0) compiler-nix-name) "Haskell Language Server")) { hls = tool "haskell-language-server"; }

static.nix

@@ -1,4 +1,4 @@
-# see https://haskell-language-server.readthedocs.io/en/latest/support/ghc-version-support.html
+self: # see https://haskell-language-server.readthedocs.io/en/latest/support/ghc-version-support.html
 # so we assume "latest" for all hls.
 # for hlint however, we need hlint-3.3 for ghc-8.10.7.
 let
@@ -45,4 +45,5 @@ compiler-nix-name: tool: {
   };
   happy = { version = "1.20.1.1"; inherit cabalProjectLocal; };
   alex = { version = "3.2.7.3"; inherit cabalProjectLocal; };
+  cabal = { src = self.inputs.cabal; };
 }.${tool} or fixed-versions.${tool}.${compiler-nix-name} or {}