Merge pull request #117 from eatb33ts/master

Add nix-shell for nix/nixos users

README.md

@@ -56,6 +56,9 @@ Install from available [AUR package](https://aur.archlinux.org/packages/alfis) c
 yay -S alfis
 ```
 
+### On Nix/NixOS
+`nix-shell` in this repo and then run `cargo build` and `cargo install` after you have entered the shell.
+
 ## Installation
 
 ### Debian/Ubuntu (only blockchain DNS, without GUI)
@@ -95,4 +98,4 @@ If you want it to load config from another file you can command it so: `alfis -c
 1. Stabilize blockchain functions (domain transfer, info & contacts in UI), bug hunting and fixing.
 2. Change DNS server/proxy to own resource saving implementation (using trust-dns-proto for RR parsing).
 3. P2P traffic encryption (ECDH).
-4. Web-GUI to manage you node from browser.
+4. Web-GUI to manage you node from browser.

shell.nix

@@ -0,0 +1,10 @@
+let
+  # Pinned nixpkgs, deterministic. Last updated: 2/12/21.
+  pkgs = import (fetchTarball("https://github.com/NixOS/nixpkgs/archive/a58a0b5098f0c2a389ee70eb69422a052982d990.tar.gz")) {};
+
+  # Rolling updates, not deterministic.
+  # pkgs = import (fetchTarball("channel:nixpkgs-unstable")) {};
+
+in pkgs.mkShell {
+  buildInputs = [ pkgs.cargo pkgs.rustc pkgs.webkitgtk pkgs.pkg-config pkgs.kdialog];
+}