diff --git a/.github/workflows/docker.yaml b/.github/workflows/docker.yaml
index 3d1fdb40ff..6eed09c482 100644
--- a/.github/workflows/docker.yaml
+++ b/.github/workflows/docker.yaml
@@ -73,7 +73,7 @@ jobs:
           python-version: ${{ env.python_version }}
       - name: Version Check
         run: |
-          pip install --require-hashes -r .github/requirements.txt
+          pip install --require-hashes -r contrib/dev_reqs/requirements.txt
           python3 .github/scripts/version_check.py
           echo "git_commit_hash=$(git rev-parse --short HEAD)" >> $GITHUB_ENV
           echo "git_commit_date=$(git show -s --format=%ci)" >> $GITHUB_ENV
diff --git a/.github/workflows/qc_checks.yaml b/.github/workflows/qc_checks.yaml
index 5ca705eefa..257f75d3f6 100644
--- a/.github/workflows/qc_checks.yaml
+++ b/.github/workflows/qc_checks.yaml
@@ -104,7 +104,7 @@ jobs:
         uses: pre-commit/action@2c7b3805fd2a0fd8c1884dcaebf91fc102a13ecd # pin@v3.0.1
       - name: Check Version
         run: |
-          pip install --require-hashes -r .github/requirements.txt
+          pip install --require-hashes -r contrib/dev_reqs/requirements.txt
           python3 .github/scripts/version_check.py
 
   mkdocs:
@@ -122,7 +122,7 @@ jobs:
           python-version: ${{ env.python_version }}
       - name: Check Config
         run: |
-          pip install --require-hashes -r .github/requirements.txt
+          pip install --require-hashes -r contrib/dev_reqs/requirements.txt
           pip install --require-hashes -r docs/requirements.txt
           python docs/ci/check_mkdocs_config.py
       - name: Check Links
@@ -168,7 +168,7 @@ jobs:
       - name: Download public schema
         if: needs.paths-filter.outputs.api == 'false'
         run: |
-          pip install --require-hashes -r .github/requirements.txt >/dev/null 2>&1
+          pip install --require-hashes -r contrib/dev_reqs/requirements.txt >/dev/null 2>&1
           version="$(python3 .github/scripts/version_check.py only_version 2>&1)"
           echo "Version: $version"
           url="https://raw.githubusercontent.com/inventree/schema/main/export/${version}/api.yaml"
@@ -187,7 +187,7 @@ jobs:
         id: version
         if: github.ref == 'refs/heads/master' && needs.paths-filter.outputs.api == 'true'
         run: |
-          pip install --require-hashes -r .github/requirements.txt >/dev/null 2>&1
+          pip install --require-hashes -r contrib/dev_reqs/requirements.txt >/dev/null 2>&1
           version="$(python3 .github/scripts/version_check.py only_version 2>&1)"
           echo "Version: $version"
           echo "version=$version" >> "$GITHUB_OUTPUT"
diff --git a/.github/workflows/release.yaml b/.github/workflows/release.yaml
index 1a0069b91c..bdfe44fbf1 100644
--- a/.github/workflows/release.yaml
+++ b/.github/workflows/release.yaml
@@ -18,7 +18,7 @@ jobs:
         uses: actions/checkout@44c2b7a8a4ea60a981eaca3cf939b5f4305c123b # pin@v4.1.5
       - name: Version Check
         run: |
-          pip install --require-hashes -r .github/requirements.txt
+          pip install --require-hashes -r contrib/dev_reqs/requirements.txt
           python3 .github/scripts/version_check.py
       - name: Push to Stable Branch
         uses: ad-m/github-push-action@d91a481090679876dfc4178fef17f286781251df # pin@v0.8.0
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 6cace6d147..6c99a6f6d5 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -39,8 +39,8 @@ repos:
         files: src/backend/requirements\.(in|txt)$
       - id: pip-compile
         name: pip-compile requirements.txt
-        args: [.github/requirements.in, -o, .github/requirements.txt,--python-version=3.9, --no-strip-extras, --generate-hashes]
-        files: .github/requirements\.(in|txt)$
+        args: [contrib/dev_reqs/requirements.in, -o, contrib/dev_reqs/requirements.txt,--python-version=3.9, --no-strip-extras, --generate-hashes]
+        files: contrib/dev_reqs/requirements\.(in|txt)$
       - id: pip-compile
         name: pip-compile requirements.txt
         args: [docs/requirements.in, -o, docs/requirements.txt,--python-version=3.9, --no-strip-extras, --generate-hashes]
diff --git a/.github/requirements.in b/contrib/dev_reqs/requirements.in
similarity index 100%
rename from .github/requirements.in
rename to contrib/dev_reqs/requirements.in
diff --git a/.github/requirements.txt b/contrib/dev_reqs/requirements.txt
similarity index 99%
rename from .github/requirements.txt
rename to contrib/dev_reqs/requirements.txt
index 5729dce9e3..8b5c921d65 100644
--- a/.github/requirements.txt
+++ b/contrib/dev_reqs/requirements.txt
@@ -1,5 +1,5 @@
 # This file was autogenerated by uv via the following command:
-#    uv pip compile .github/requirements.in -o .github/requirements.txt --python-version=3.9 --no-strip-extras --generate-hashes
+#    uv pip compile contrib/dev_reqs/requirements.in -o contrib/dev_reqs/requirements.txt --python-version=3.9 --no-strip-extras --generate-hashes
 certifi==2024.2.2 \
     --hash=sha256:0569859f95fc761b18b45ef421b1290a0f65f147e92a1e5eb3e635f9a5e4e66f \
     --hash=sha256:dc383c07b76109f368f6106eee2b593b04a011ea4d55f652c6ca24a754d1cdd1
diff --git a/contrib/packager.io/functions.sh b/contrib/packager.io/functions.sh
index 8f7f47cc66..bb236be77d 100755
--- a/contrib/packager.io/functions.sh
+++ b/contrib/packager.io/functions.sh
@@ -44,6 +44,18 @@ function detect_ip() {
   echo "IP address is ${INVENTREE_IP}"
 }
 
+function detect_python() {
+  # Detect if there is already a python version installed in /opt/inventree/env/lib
+  if test -f "${APP_HOME}/env/bin/python"; then
+    echo "# Python environment already present"
+    # Extract earliest python version initialised from /opt/inventree/env/lib
+    SETUP_PYTHON=$(ls -1 ${APP_HOME}/env/bin/python* | sort | head -n 1)
+    echo "# Found earliest version: ${SETUP_PYTHON}"
+  else
+    echo "# No python environment found - using ${SETUP_PYTHON}"
+  fi
+}
+
 function get_env() {
   envname=$1
 
@@ -90,7 +102,7 @@ function detect_envs() {
     echo "# Using existing config file: ${INVENTREE_CONFIG_FILE}"
 
     # Install parser
-    pip install --require-hashes -r ${APP_HOME}/.github/requirements.txt -q
+    pip install --require-hashes -r ${APP_HOME}/contrib/dev_reqs/requirements.txt -q
 
     # Load config
     local CONF=$(cat ${INVENTREE_CONFIG_FILE} | jc --yaml)
@@ -163,12 +175,20 @@ function create_initscripts() {
     sudo -u ${APP_USER} --preserve-env=$SETUP_ENVS bash -c "cd ${APP_HOME} && ${SETUP_PYTHON} -m venv env"
     sudo -u ${APP_USER} --preserve-env=$SETUP_ENVS bash -c "cd ${APP_HOME} && env/bin/pip install invoke wheel"
 
+    # Check INSTALLER_EXTRA exists and load it
+    if test -f "${APP_HOME}/INSTALLER_EXTRA"; then
+      echo "# Loading extra packages from INSTALLER_EXTRA"
+      source ${APP_HOME}/INSTALLER_EXTRA
+    fi
+
     if [ -n "${SETUP_EXTRA_PIP}" ]; then
       echo "# Installing extra pip packages"
       if [ -n "${SETUP_DEBUG}" ]; then
         echo "# Extra pip packages: ${SETUP_EXTRA_PIP}"
       fi
       sudo -u ${APP_USER} --preserve-env=$SETUP_ENVS bash -c "cd ${APP_HOME} && env/bin/pip install ${SETUP_EXTRA_PIP}"
+      # Write extra packages to INSTALLER_EXTRA
+      echo "SETUP_EXTRA_PIP='${SETUP_EXTRA_PIP}'" >>${APP_HOME}/INSTALLER_EXTRA
     fi
   fi
 
@@ -283,6 +303,20 @@ function set_env() {
   chown ${APP_USER}:${APP_GROUP} ${DATA_DIR} ${INVENTREE_CONFIG_FILE}
 }
 
+function set_site() {
+  # Ensure IP is known
+  if [ -z "${INVENTREE_IP}" ]; then
+    echo "# No IP address found - skipping"
+    return
+  fi
+
+  # Check if INVENTREE_SITE_URL in inventree config
+  if [ -z "$(inventree config:get INVENTREE_SITE_URL)" ]; then
+    echo "# Setting up InvenTree site URL"
+    inventree config:set INVENTREE_SITE_URL=http://${INVENTREE_IP}
+  fi
+}
+
 function final_message() {
   echo -e "####################################################################################"
   echo -e "This InvenTree install uses nginx, the settings for the webserver can be found in"
diff --git a/contrib/packager.io/postinstall.sh b/contrib/packager.io/postinstall.sh
index 03230b955a..89c88833b1 100755
--- a/contrib/packager.io/postinstall.sh
+++ b/contrib/packager.io/postinstall.sh
@@ -33,6 +33,7 @@ detect_envs
 detect_docker
 detect_initcmd
 detect_ip
+detect_python
 
 # create processes
 create_initscripts
@@ -45,6 +46,7 @@ update_or_install
 if [ "${SETUP_CONF_LOADED}" = "true" ]; then
   set_env
 fi
+set_site
 start_inventree
 
 # show info