Revert "Use unstable installation ISO"

This reverts commit bd267b8a5e.
2019-07-21 18:25:42 +00:00
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # Fully reproducible localhost

-[Download NixOS installation ISO](https://nixos.org/channels/nixos-unstable).
+[Download NixOS installation ISO](https://nixos.org/nixos/download.html)

 ## Installation