Include agenix module and package directly

Avoids adding an extra flake input only to fetch a single module and
package.

m/common/base/agenix.nix

@@ -1,8 +1,3 @@
-{ pkgs, ... }:
-
 {
   imports = [ ../../module/agenix.nix ];
-
-  # Add agenix to system packages
-  environment.systemPackages = [ pkgs.agenix ];
 }

m/module/agenix.nix

@@ -297,6 +297,9 @@ in
         };
       };
 
+      # Add agenix to system packages
+      environment.systemPackages = [ pkgs.agenix ];
+
       # Create a new directory full of secrets for symlinking (this helps
       # ensure removed secrets are actually removed, or at least become
       # invalid symlinks).

pkgs/agenix/default.nix

@@ -27,6 +27,7 @@ stdenv.mkDerivation rec {
   doInstallCheck = true;
   installCheckInputs = [ shellcheck ];
   postInstallCheck = ''
+    set -x
     shellcheck ${bin}
     ${bin} -h | grep ${version}
 
@@ -56,6 +57,7 @@ stdenv.mkDerivation rec {
 
     cd $HOME/secrets
     test $(${bin} -d secret1.age) = "hello"
+    set +x
   '';
 
   installPhase = ''

pkgs/agenix/update.sh

@@ -1,23 +0,0 @@
-#!/bin/sh
-
-set -e
-
-# All operations are done relative to root
-GITROOT=$(git rev-parse --show-toplevel)
-cd "$GITROOT"
-
-REVISION=${1:-main}
-
-TMPCLONE=$(mktemp -d)
-trap "rm -rf ${TMPCLONE}" EXIT
-
-git clone https://github.com/ryantm/agenix.git --revision="$REVISION" "$TMPCLONE" --depth=1
-
-cp "${TMPCLONE}/pkgs/agenix.sh" pkgs/agenix/agenix.sh
-cp "${TMPCLONE}/pkgs/agenix.nix" pkgs/agenix/default.nix
-sed -i 's#../example#./example#' pkgs/agenix/default.nix
-
-cp "${TMPCLONE}/example/"* pkgs/agenix/example/
-cp "${TMPCLONE}/example_keys/"* pkgs/agenix/example_keys/
-
-cp "${TMPCLONE}/modules/age.nix" m/module/agenix.nix