Mention Nix package in README

In the `README.md` document, where said document documents the
availability of pre-built packages of ripgrep, document the
availability of such a package from the package management system Nix.

1 files changed, 8 insertions, 0 deletions

diff --git a/README.md b/README.md
index 607767eb..e0ad6818 100644
--- a/README.md
+++ b/README.md
@@ -132,6 +132,14 @@ $ yum-config-manager --add-repo=https://copr.fedorainfracloud.org/coprs/carlgeor
 $ yum install ripgrep
 ```
 
+If you're a **Nix** user, you can install `ripgrep` from
+[nixpkgs](https://github.com/NixOS/nixpkgs/blob/master/pkgs/tools/text/ripgrep/default.nix):
+
+```
+$ nix-env --install ripgrep
+$ # (Or using the attribute name, which is also `ripgrep`.)
+```
+
 If you're a **Rust programmer**, `ripgrep` can be installed with `cargo`:
 
 ```