* Fix bzip2 static build for musl
* Enable static builds for xz/lzma
This is (currently) the same package on nixpkgs, so we make it the same
package here too.
For ghc 9.0.2 Haskell.nix will use the `stm`and `filepath` source that came with `ghc` when the version desired matches. This is because 9.0.2 shipped with packages that differ from the same version in hackage.
`reinstallableLibGhc` is fixed for GHC 8.10 and above. Rather than including a patch file this works by:
* Setting the `subDir` to the `compiler` directory when building. That way relative paths to other parts of the `ghc` source tree (outside the `compiler` directory) still work.
* Files that are needed, but generated when `ghc` builds are added from the `generated` output of the ghc derivation.
`nonReinstallablePkgs` is now sorted and deduplicated before it is used (this reduces the chance of rebuilds when the list is refactored).
There's a typo in the table of supported versions: two of the 21.11 rows should say `nixpkgs-2111` rather than `nixpkgs-2105`. This threw me off for a bit earlier because I skimmed the table and thought 21.11 wasn't supported yet.
When downloading a `repository` block we get a number of files (not just the index). For some repositories these files will be necessary for `cabal configure` and the vanilla ones created by haskell.nix will not work. This change keeps these extra files and combines them with the main hackage index using `lndir`, so that changes to the repo will not require a new copy of the hackage index in the store.
This change also introduces `inputMap` that allows flake or niv inputs to be used to pin repository. It also works with `source-repository-package` blocks.
