mirror of
https://github.com/simplex-chat/haskell.nix.git
synced 2026-06-03 09:17:32 +00:00
Toon Nolten
7545dc496b
Haskell.nix's `default.nix` is now a function that needs to be called and `hackage-package` can no longer rely on the default internal GHC so `compiler-nix-name` needs to be specified explicitly.
44 lines
2.2 KiB
Markdown
44 lines
2.2 KiB
Markdown
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# Build a specific package from Hackage or Stackage
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## From a [Stackage][] snapshot
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To build a package, say [lens][], from a Stackage snapshot, say
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[lts-13.28][], you could run:
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```bash
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nix build '(with import <nixpkgs> (import (builtins.fetchTarball "https://github.com/input-output-hk/haskell.nix/archive/master.tar.gz") {}).nixpkgsArgs; haskell-nix.snapshots."lts-13.28").lens.components.library'
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```
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This would build the (public) library component of the [lens][] package as
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fixed by the [lts-13.28][] stackage snapshot. Nightly snapshots like
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`nightly-2020-06-21` are also available.
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## A specific version from Hackage
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To build any package from hackage, say [lens][], at any version, say 4.17.1,
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you could run:
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```bash
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nix build '(with import <nixpkgs> (import (builtins.fetchTarball "https://github.com/input-output-hk/haskell.nix/archive/master.tar.gz") {}).nixpkgsArgs; (haskell-nix.hackage-package { name = "lens"; version = "4.17.1"; compiler-nix-name = "ghc8102"; })).components.library'
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```
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This would build the (public) library component of the [lens-4.17.1][] package
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from hackage.
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### Pinning hackage index
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The dependencies would be resolved against the most recent
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[hackage-index-state][] which comes with your [haskell.nix][] checkout via the
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[hackage.nix][] pin. A specific one can be specified as well:
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```bash
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nix build '(with import <nixpkgs> (import (builtins.fetchTarball "https://github.com/input-output-hk/haskell.nix/archive/master.tar.gz") {}).nixpkgsArgs; (haskell-nix.hackage-package { name = "lens"; version = "4.17.1"; compiler-nix-name = "ghc8102"; index-state = "2019-07-14T00:00:00Z"; })).components.library'
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```
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This would use the hackage index as of `2019-07-14T00:00:00Z` to produce a
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build plan for the [lens-4.17.1][] package.
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[Stackage]: https://stackage.org
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[Hackage]: https://hackage.haskell.org
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[hackage.nix]: https://github.com/input-output-hk/hackage.nix
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[haskell.nix]: https://github.com/input-output-hk/haskell.nix
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[lts-13.28]: https://www.stackage.org/lts-13.28
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[lens]: https://hackage.haskell.org/package/lens
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[lens-4.17.1]: https://hackage.haskell.org/package/lens-4.17.1
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[hackage-index-state]: https://github.com/input-output-hk/hackage.nix/blob/master/index-state-hashes.nix
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