diff --git a/lib/fetchfile.nix b/lib/fetchfile.nix
new file mode 100644
index 0000000..573db92
--- /dev/null
+++ b/lib/fetchfile.nix
@@ -0,0 +1,7 @@
+{ stdenv, pkgs, ... }:
+	{ path, storeHash, ... }:
+		let
+			derivationName = baseNameOf path;
+			storePath = "/nix/store/${storeHash}-${derivationName}";
+		in
+			if builtins.pathExists storePath then storePath else path
diff --git a/lib/list-to-bash-array.nix b/lib/list-to-bash-array.nix
new file mode 100644
index 0000000..b87c31a
--- /dev/null
+++ b/lib/list-to-bash-array.nix
@@ -0,0 +1,37 @@
+# Source: http://chriswarbo.net/projects/nixos/useful_hacks.html
+
+{ args, name }:
+  let
+    nixpkgs = import <nixpkgs> {};
+    lib = nixpkgs.lib;
+  in
+    rec {
+      # Store each arg in a separate variable, named numerically
+      env = with lib.foldl' (result: arg: {
+                          # Increment the count, for the next arg (if any)
+                          count = result.count + 1;
+
+                          # Append a variable to the environment for this arg
+                          vars  = result.vars // {
+                            "${name}${toString result.count}" = arg;
+                          };
+                        })
+                        # Start with variable 1 in an empty environment
+                        { count = 1; vars = {}; }
+                        args;
+            vars;
+
+      code = ''
+        ### Auto-generated by nixListToBashArray
+        ${name}=()
+
+        for N in $(seq 1 "${toString (lib.length args)}")
+        do
+          # Use a "variable variable" to look up "$name$N" as a variable name
+          NIXLISTTOBASHARRAYTEMP="${name}$N"
+          ${name}=("''${${name}[@]}" "''${!NIXLISTTOBASHARRAYTEMP}")
+          unset NIXLISTTOBASHARRAYTEMP
+        done
+        ### End of auto-generated code
+      '';
+    }
diff --git a/lib/packages.nix b/lib/packages.nix
index 4e021cc..c3ba3d5 100644
--- a/lib/packages.nix
+++ b/lib/packages.nix
@@ -2,6 +2,7 @@ options: let
     combinedOptions = options // {
         overlays = [
             (import ../nixpkgs-mozilla/rust-overlay.nix)
+            (import (fetchTarball https://git.cryto.net/joepie91/morepkgs/archive/master.tar.gz))
             (self: super: {
                 jre8Plugin = super.jre8Plugin.overrideAttrs (drv: {
                     src = ../sources/jdk-8u141-linux-x64.tar.gz;
@@ -11,7 +12,9 @@ options: let
     };
 in {
     master = (import (fetchTarball https://github.com/NixOS/nixpkgs/archive/master.tar.gz) combinedOptions);
-    unstable = (import (fetchTarball https://github.com/NixOS/nixpkgs-channels/archive/nixos-unstable.tar.gz) combinedOptions);
+    /* unstable = (import (fetchTarball https://github.com/NixOS/nixpkgs-channels/archive/nixos-unstable.tar.gz) combinedOptions); */
+    unstable = (import (fetchTarball https://github.com/NixOS/nixpkgs-channels/archive/e05a926713441a4ec632c7b793448654f7c2056d.tar.gz) combinedOptions);
+    /* unstable = (import <nixpkgs>) combinedOptions; */
     nixpkgs = (import <nixpkgs>) combinedOptions;
     myNixpkgs = (import ../packages) {};
 }