README.rst: fix also nixpkgs-unstable installation

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Jörg Thalheim 2020-03-17 12:24:01 +00:00
parent 4cf2b68b5e
commit 5a92156a95
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@ -50,10 +50,10 @@ Note that this asserts formatting with the latest version of
[black](https://github.com/psf/black), so you may need to specify a more up to
date version of NixPkgs:
```console
$ nix-build -I nixpkgs=https://github.com/NixOS/nixpkgs-channels/archive/nixpkgs-unstable.tar.gz
$ ./result/bin/nix-update
```
::
$ nix-build -I nixpkgs=https://github.com/NixOS/nixpkgs-channels/archive/nixpkgs-unstable.tar.gz
$ ./result/bin/nix-update
USAGE
-----