Rename haskellPackages -> basePackages (#77)

* Rename haskellPackages -> basePackages

* Typo

CHANGELOG.md

@@ -7,7 +7,7 @@
 - API changes
     - #37: Group `buildTools` (renamed to `tools`), `hlsCheck` and `hlintCheck` under the `devShell` submodule option; and allow disabling them all using `devShell.enable = false;` (useful if you want haskell-flake to produce just the package outputs).
     - #64: Remove hlintCheck (use [treefmt-nix](https://github.com/numtide/treefmt-nix#flake-parts) instead)
-    - #52: Expose the final package set (API provisional)
+    - #52: Expose the final package set as `finalPackages`. Rename `haskellPackages`, accordingly, to `basePackages`. Overlays are applied on top of `basePackage` -- using `source-overrides`, `overrides`, `packages` in that order -- to produce `finalPackages`.
 
 ## 0.1.0
 

flake-module.nix

@@ -77,7 +77,7 @@ in
               ./haskell-project.nix
               {
                 options = {
-                  haskellPackages = mkOption {
+                  basePackages = mkOption {
                     type = types.attrsOf raw;
                     description = ''
                       Which Haskell package set / compiler to use.
@@ -144,7 +144,7 @@ in
                     type = types.attrsOf raw;
                     readOnly = true;
                     description = ''
-                      The final package set, based `haskellPackages` plus
+                      The final package set, based on `basePackages` plus
                       the additions and overrides specified in the other options.
                     '';
                   };

haskell-project.nix

@@ -68,7 +68,7 @@ in
       };
     in
     {
-      finalPackages = config.haskellPackages.extend config.finalOverlay;
+      finalPackages = config.basePackages.extend config.finalOverlay;
 
       finalOverlay = lib.composeManyExtensions [
         # The order here matters.