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README.md: update Nix instructions

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Vaibhav Sagar 2020-05-11 04:24:04 +08:00
parent 6e35724b92
commit 9caa54fdce
1 changed files with 2 additions and 4 deletions
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@ -245,7 +245,7 @@ If you have the `nix` package manager installed, you can create an IHaskell
notebook environment with one command. For example:
```bash
$ nix-build -I nixpkgs=https://github.com/NixOS/nixpkgs-channels/archive/nixos-19.09.tar.gz release.nix --argstr compiler ghc865 --arg packages "haskellPackages: [ haskellPackages.lens ]"
$ nix-build -I nixpkgs=https://github.com/NixOS/nixpkgs-channels/archive/nixos-20.03.tar.gz release.nix --argstr compiler ghc865 --arg packages "haskellPackages: [ haskellPackages.lens ]"
<result path>
$ <result path>/bin/ihaskell-notebook
```
@ -258,11 +258,9 @@ prebuilt artifacts.
The IHaskell display modules are not loaded by default and have to be specified as additional packages:
```bash
$ NIXPKGS_ALLOW_BROKEN=1 nix-build -I nixpkgs=https://github.com/NixOS/nixpkgs-channels/archive/nixos-19.09.tar.gz release.nix --argstr compiler ghc844 --arg packages "haskellPackages: [ haskellPackages.ihaskell-blaze haskellPackages.ihaskell-charts ]"
$ nix-build -I nixpkgs=https://github.com/NixOS/nixpkgs-channels/archive/nixos-20.03.tar.gz release.nix --argstr compiler ghc865 --arg packages "haskellPackages: [ haskellPackages.ihaskell-blaze haskellPackages.ihaskell-charts ]"
```
We use GHC 8.4 here because not all dependencies have been updated to support GHC 8.6 yet.
For more examples of using IHaskell with Nix, see https://github.com/vaibhavsagar/notebooks.
# Troubleshooting