Merge pull request #5832 from ipfs/docs/guix-package

README: document guix package

Author: Stebalien

README.md

@@ -101,8 +101,17 @@ For Linux and MacOSX you can use the purely functional package manager [Nix](htt
 ```
 $ nix-env -i ipfs
 ```
+
 You can also install the Package by using it's attribute name, which is also `ipfs`.
 
+#### Guix
+
+GNU's functional package manager, [Guix](https://www.gnu.org/software/guix/), also provides a go-ipfs package:
+
+```
+$ guix package -i go-ipfs
+```
+
 #### Snap
 
 With snap, in any of the [supported Linux distributions](https://snapcraft.io/docs/core/install):