diff --git a/pkgs/servers/web-apps/discourse/plugins/up-plugin.sh b/pkgs/servers/web-apps/discourse/plugins/up-plugin.sh
new file mode 100755
index 000000000000..ba103c5f6b2b
--- /dev/null
+++ b/pkgs/servers/web-apps/discourse/plugins/up-plugin.sh
@@ -0,0 +1,39 @@
+#!/usr/bin/env nix-shell
+#!nix-shell -i bash -p bash curl ruby.devEnv git sqlite libpcap postgresql libxml2 libxslt pkg-config bundix gnumake
+# src https://nixos.wiki/wiki/Packaging/Ruby
+
+# This script should be ran afte rupdating a plugin that has a gemset.nix
+# Usage: ./up-plugin.sh <plugin-id>
+# NOTE: Script must be ran directly as ./up-plugin, otherwise the nix-shell won't work
+
+set -exuo pipefail
+
+PLUGIN="$1"
+SELF="$(dirname "$(readlink -f "$0")")"
+
+PL_DIR="$SELF/$PLUGIN"
+TOP="$SELF/../../../../.."
+TMP=$(mktemp -d)
+
+pushd "$TMP"
+
+if cat "$PL_DIR/default.nix" | grep gemdir >/dev/null; then
+  nix-build -A discourse.plugins.$PLUGIN.src "$TOP"
+  if [ -e result/Gemfile ]; then
+    cp result/Gemfile Gemfile
+    if [ -e result/Gemfile.lock ]; then
+      cp result/Gemfile.lock Gemfile.lock
+    fi
+  else
+    echo '# frozen_string_literal: true
+
+source "https://rubygems.org"' > Gemfile
+    cat result/plugin.rb | grep "^gem" >> Gemfile
+  fi
+  if [ ! -e Gemfile.lock ]; then
+    bundle install
+  fi
+  bundix
+  cp Gemfile Gemfile.lock gemset.nix "$PL_DIR"
+fi
+