diff --git a/niveum-deploy b/niveum-deploy
deleted file mode 100755
index 2a4b833..0000000
--- a/niveum-deploy
+++ /dev/null
@@ -1,6 +0,0 @@
-#!/bin/sh
-niveum_dir="$HOME/projects/niveum"
-
-[ $# -eq 1 ] || echo >&2 "Usage: niveum-deploy SYSTEM"
-
-eval "$(nix-build --no-out-link "$niveum_dir/deploy.nix" -A "$1")"
diff --git a/niveum-status b/niveum-status
deleted file mode 100755
index 87af4a8..0000000
--- a/niveum-status
+++ /dev/null
@@ -1,20 +0,0 @@
-#!/bin/sh
-version_file=/etc/niveum/version
-niveum_dir="$HOME/projects/niveum"
-
-machine_status () {
-  hostname="$1"
-
-  if commit_id="$(ssh "$hostname" cat $version_file 2>/dev/null)"; then
-    machine_status="$(git -C "$niveum_dir" log -1 --oneline "$commit_id")"
-  else
-    machine_status=offline
-  fi
-
-  printf "\033[1m%11s\033[0m %s\n" "$hostname" "$machine_status"
-}
-
-for system in "$niveum_dir"/systems/*; do
-  hostname="$(basename "$system")"
-  machine_status "$hostname"
-done
diff --git a/niveum-update b/niveum-update
deleted file mode 100755
index 7f89329..0000000
--- a/niveum-update
+++ /dev/null
@@ -1,69 +0,0 @@
-#!/bin/sh
-NIXOS_VERSION=20.03
-
-fetch() {
-  rev=$1
-  output=$2
-  url=${3:-https://github.com/NixOS/nixpkgs-channels.git}
-
-  printf "\033[1m$url\033[0m $rev\n"
-  nix-prefetch-git \
-    --url "${url}" \
-    --rev "${rev}" \
-    > "${output}"
-}
-
-nixpkgs() {
-  fetch "refs/heads/nixos-$NIXOS_VERSION" .versions/nixpkgs.json
-}
-
-nixpkgs_unstable() {
-  fetch "refs/heads/nixos-unstable" .versions/nixpkgs-unstable.json
-}
-
-home_manager() {
-  fetch "refs/heads/release-$NIXOS_VERSION" .versions/home-manager.json "https://github.com/rycee/home-manager.git"
-}
-
-krops() {
-  fetch "refs/tags/v1.21.0" .versions/krops.json "https://cgit.krebsco.de/krops"
-}
-
-stockholm() {
-  fetch "refs/heads/master" .versions/stockholm.json "https://cgit.krebsco.de/stockholm"
-}
-
-usage() {
-  echo >&2 "Usage: $0 [--all | REPO... ]
-
-  Where REPO is one of nixpkgs, home-manager, krops, stockholm"
-  exit 1
-}
-
-if [ $# -eq 0 ]; then
-  usage
-else
-  for arg in "$@"; do
-    case $arg in
-      nixpkgs)
-        nixpkgs &
-        nixpkgs_unstable & ;;
-      home-manager)
-        home_manager & ;;
-      krops)
-        krops & ;;
-      stockholm)
-        stockholm & ;;
-      --all)
-        nixpkgs &
-        nixpkgs_unstable &
-        home_manager &
-        krops &
-        stockholm & ;;
-      *)
-        usage ;;
-    esac
-    shift
-  done
-  wait
-fi
diff --git a/shell.nix b/shell.nix
new file mode 100644
index 0000000..4b7d64c
--- /dev/null
+++ b/shell.nix
@@ -0,0 +1,79 @@
+{ pkgs ? import <nixpkgs> { } }:
+let
+  inherit (pkgs) lib;
+
+  dependencies = let nixosVersion = "20.03";
+  in {
+    nixpkgs = {
+      ref = "refs/heads/nixos-${nixosVersion}";
+      url = "https://github.com/NixOS/nixpkgs-channels.git";
+      path = ".versions/nixpkgs.json";
+    };
+    nixpkgs-unstable = {
+      ref = "refs/heads/nixos-unstable";
+      url = "https://github.com/NixOS/nixpkgs-channels.git";
+      path = ".versions/nixpkgs-unstable.json";
+    };
+    home-manager = {
+      ref = "refs/heads/release-${nixosVersion}";
+      url = "https://github.com/rycee/home-manager.git";
+      path = ".versions/home-manager.json";
+    };
+    krops = {
+      ref = "refs/tags/v1.21.0";
+      url = "https://cgit.krebsco.de/krops";
+      path = ".versions/krops.nix";
+    };
+    stockholm = {
+      ref = "refs/heads/master";
+      url = "https://cgit.krebsco.de/stockholm";
+      path = ".versions/stockholm.json";
+    };
+  };
+
+  updateScript = name: dependency: ''
+    ${pkgs.nix-prefetch-git}/bin/nix-prefetch-git --url "${dependency.url}" --rev "${dependency.ref}" > "${toString ./.}/${dependency.path}"'';
+
+  updateScripts =
+    lib.mapAttrsToList
+      (name: dependency: pkgs.writers.writeDashBin "niveum-update-${name}" (updateScript name dependency))
+      dependencies;
+
+  updateAllScript = pkgs.writers.writeDashBin "niveum-update" (lib.concatStringsSep " &\n" (lib.mapAttrsToList updateScript dependencies));
+in pkgs.mkShell {
+
+  buildInputs = updateScripts ++ [ updateAllScript ] ++ [
+    (let
+      deployCommand = pkgs.writers.writeDash "niveum-deploy-one" ''
+        eval "$(${pkgs.nix}/bin/nix-build --no-out-link "${toString ./.}/deploy.nix" -A "$1")"
+      '';
+    in pkgs.writers.writeDashBin "niveum-deploy" ''
+      ${pkgs.parallel}/bin/parallel --line-buffer --tagstring '{}' -q ${deployCommand} '{1}' ::: "$@"
+    '')
+
+    (pkgs.writers.writeDashBin "niveum-status" ''
+      cd "${toString ./.}"
+
+      version_file=/etc/niveum/version
+
+      machine_status () {
+        hostname="$1"
+
+        if commit_id="$(${pkgs.openssh}/bin/ssh "$hostname" cat $version_file 2>/dev/null)"; then
+          machine_status="$(${pkgs.git}/bin/git log -1 --oneline "$commit_id")"
+        else
+          machine_status=offline
+        fi
+
+        printf "\033[1m%11s\033[0m %s\n" "$hostname" "$machine_status"
+      }
+
+      for system in systems/*; do
+        hostname="$(basename "$system")"
+        machine_status "$hostname"
+      done
+    '')
+  ];
+
+  shellHook = "export HISTFILE=${toString ./.history}";
+}