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Update specific package building tutorial (#867)

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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.
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Toon Nolten 2020-10-07 01:18:44 +02:00 committed by GitHub
parent b12905981d
commit 7545dc496b
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6
docs/tutorials/building-package-from-stackage-hackage.md
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@ -6,7 +6,7 @@
To build a package, say [lens][], from a Stackage snapshot, say
[lts-13.28][], you could run:
```bash
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'
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'
```
This would build the (public) library component of the [lens][] package as
fixed by the [lts-13.28][] stackage snapshot. Nightly snapshots like
@ -17,7 +17,7 @@ fixed by the [lts-13.28][] stackage snapshot. Nightly snapshots like
To build any package from hackage, say [lens][], at any version, say 4.17.1,
you could run:
```bash
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"; })).components.library'
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'
```
This would build the (public) library component of the [lens-4.17.1][] package
from hackage.
@ -28,7 +28,7 @@ The dependencies would be resolved against the most recent
[hackage-index-state][] which comes with your [haskell.nix][] checkout via the
[hackage.nix][] pin. A specific one can be specified as well:
```bash
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"; index-state = "2019-07-14T00:00:00Z"; })).components.library'
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'
```
This would use the hackage index as of `2019-07-14T00:00:00Z` to produce a
build plan for the [lens-4.17.1][] package.