diff --git a/.github/workflows/test-linux.yml b/.github/workflows/test-linux.yml
index 2f5465a6e..f26cc1218 100644
--- a/.github/workflows/test-linux.yml
+++ b/.github/workflows/test-linux.yml
@@ -57,12 +57,37 @@ jobs:
 
       - name: "Create container ${{ inputs.container-slug }}"
         run: |
-          /usr/bin/docker create --name ${{ github.run_id }}_salt-test --workdir /_w/ --privileged -e "HOME=/github/home" -e GITHUB_ACTIONS=true -e CI=true -e $GITHUB_ENV -v "/var/run/docker.sock":"/var/run/docker.sock" -v "/home/runner/work":"/__w" -v "/home/runner/work/_temp":"/__w/_temp" -v "/home/runner/work/_actions":"/__w/_actions" -v "/opt/hostedtoolcache":"/__t" -v "/home/runner/work/_temp/_github_home":"/github/home" -v "/home/runner/work/_temp/_github_workflow":"/github/workflow" -v "/home/runner/work/salt-bootstrap/salt-bootstrap":"/_w/btstrap"  --entrypoint "/usr/lib/systemd/systemd" ghcr.io/saltstack/salt-ci-containers/testing:${{ inputs.container-slug }} --systemd --unit rescue.target
+          /usr/bin/docker create --name ${{ github.run_id }}_salt-test --workdir /_w/ --privileged -e "HOME=/github/home" -e GITHUB_ACTIONS=true -e CI=true -e $GITHUB_ENV -v "/var/run/docker.sock":"/var/run/docker.sock" -v "/home/runner/work":"/__w" -v "/home/runner/work/_temp":"/__w/_temp" -v "/home/runner/work/_actions":"/__w/_actions" -v "/opt/hostedtoolcache":"/__t" -v "/home/runner/work/_temp/_github_home":"/github/home" -v "/home/runner/work/_temp/_github_workflow":"/github/workflow" -v "/home/runner/work/salt-bootstrap/salt-bootstrap":"/_w/btstrap"  --entrypoint "/usr/lib/systemd/systemd" ghcr.io/saltstack/salt-ci-containers/testing:${{ inputs.container-slug }} --unit=rescue.target
 
       - name: "Start container ${{ inputs.container-slug }}"
         run: |
           /usr/bin/docker start ${{ github.run_id }}_salt-test
 
+      - name: "Wait for container ${{ inputs.container-slug }} to finish booting"
+        run: |
+          # systemd's default tmpfiles.d rules wipe /tmp during early boot
+          # (systemd-tmpfiles-setup.service). Running pip/bootstrap before
+          # that finishes races the wipe and fails with spurious
+          # "No such file or directory" errors on /tmp/pip-*-tracker-*.
+          #
+          # The container boots into rescue.target (--unit=rescue.target
+          # above), so "is-system-running" settles on "maintenance", not
+          # "running"/"degraded" - those are kept as a fallback in case a
+          # given image's rescue.target ever pulls in extra units.
+          for i in $(seq 1 30); do
+            state=$(docker exec ${{ github.run_id }}_salt-test systemctl is-system-running 2>/dev/null || true)
+            echo "boot state at ${i}s: '$state'"
+            case "$state" in
+              maintenance|running|degraded) exit 0 ;;
+            esac
+            sleep 1
+          done
+          echo "::error::Container did not finish booting within 30 seconds (last state: '$state')"
+          docker exec ${{ github.run_id }}_salt-test systemctl list-jobs || true
+          docker exec ${{ github.run_id }}_salt-test systemctl --failed || true
+          docker exec ${{ github.run_id }}_salt-test journalctl -b --no-pager || true
+          exit 1
+
       - name: "Install Python Dependencies with pip breakage in container ${{ inputs.container-slug }}"
         if: ${{ ( inputs.distro-slug == 'debian-12' ) || ( inputs.distro-slug == 'debian-13' ) || ( inputs.distro-slug == 'ubuntu-2404' ) || ( inputs.distro-slug == 'ubuntu-2604' ) }}
         run: |
diff --git a/bootstrap-salt.sh b/bootstrap-salt.sh
index df4666a13..71fd3c551 100755
--- a/bootstrap-salt.sh
+++ b/bootstrap-salt.sh
@@ -3021,6 +3021,7 @@ __install_saltstack_ubuntu_repository() {
     # SaltStack's stable Ubuntu repository:
     __fetch_url "/etc/apt/sources.list.d/salt.sources" "https://github.com/saltstack/salt-install-guide/releases/latest/download/salt.sources"
     [ -f /etc/apt/sources.list.d/salt.sources ] && sed -i "s#salt-archive-keyring\.pgp#salt-archive-keyring.gpg#" /etc/apt/sources.list.d/salt.sources
+    [ -f /etc/apt/sources.list.d/salt.sources ] && sed -i "s#packages\.broadcom\.com/artifactory#${_REPO_URL}#" /etc/apt/sources.list.d/salt.sources
     __apt_key_fetch "${HTTP_VAL}://${_REPO_URL}/api/security/keypair/SaltProjectKey/public" || return 1
     __wait_for_apt apt-get update || return 1
 
@@ -3074,6 +3075,7 @@ __install_saltstack_ubuntu_onedir_repository() {
     # SaltStack's stable Ubuntu repository:
     __fetch_url "/etc/apt/sources.list.d/salt.sources" "https://github.com/saltstack/salt-install-guide/releases/latest/download/salt.sources"
     [ -f /etc/apt/sources.list.d/salt.sources ] && sed -i "s#salt-archive-keyring\.pgp#salt-archive-keyring.gpg#" /etc/apt/sources.list.d/salt.sources
+    [ -f /etc/apt/sources.list.d/salt.sources ] && sed -i "s#packages\.broadcom\.com/artifactory#${_REPO_URL}#" /etc/apt/sources.list.d/salt.sources
     __apt_key_fetch "${HTTP_VAL}://${_REPO_URL}/api/security/keypair/SaltProjectKey/public" || return 1
     __wait_for_apt apt-get update || return 1
 
@@ -3526,6 +3528,7 @@ __install_saltstack_debian_repository() {
 
     __fetch_url "/etc/apt/sources.list.d/salt.sources" "https://github.com/saltstack/salt-install-guide/releases/latest/download/salt.sources"
     [ -f /etc/apt/sources.list.d/salt.sources ] && sed -i "s#salt-archive-keyring\.pgp#salt-archive-keyring.gpg#" /etc/apt/sources.list.d/salt.sources
+    [ -f /etc/apt/sources.list.d/salt.sources ] && sed -i "s#packages\.broadcom\.com/artifactory#${_REPO_URL}#" /etc/apt/sources.list.d/salt.sources
     __apt_key_fetch "${HTTP_VAL}://${_REPO_URL}/api/security/keypair/SaltProjectKey/public" || return 1
     __wait_for_apt apt-get update || return 1
 
@@ -3572,6 +3575,7 @@ __install_saltstack_debian_onedir_repository() {
 
     __fetch_url "/etc/apt/sources.list.d/salt.sources" "https://github.com/saltstack/salt-install-guide/releases/latest/download/salt.sources"
     [ -f /etc/apt/sources.list.d/salt.sources ] && sed -i "s#salt-archive-keyring\.pgp#salt-archive-keyring.gpg#" /etc/apt/sources.list.d/salt.sources
+    [ -f /etc/apt/sources.list.d/salt.sources ] && sed -i "s#packages\.broadcom\.com/artifactory#${_REPO_URL}#" /etc/apt/sources.list.d/salt.sources
     __apt_key_fetch "${HTTP_VAL}://${_REPO_URL}/api/security/keypair/SaltProjectKey/public" || return 1
     __wait_for_apt apt-get update || return 1
 
diff --git a/tests/integration/test_installation.py b/tests/integration/test_installation.py
index c78765716..ea519beaf 100644
--- a/tests/integration/test_installation.py
+++ b/tests/integration/test_installation.py
@@ -2,6 +2,7 @@
 import logging
 import os
 import platform
+import re
 import shutil
 import subprocess
 
@@ -120,3 +121,90 @@ def test_apt_keyring_is_trusted():
     assert result.returncode == 0, result.stderr
     assert "NO_PUBKEY" not in result.stderr, result.stderr
     assert "unsupported filetype" not in result.stderr, result.stderr
+
+
+DEBIAN_REPO_FUNCTIONS = [
+    "__install_saltstack_ubuntu_repository",
+    "__install_saltstack_ubuntu_onedir_repository",
+    "__install_saltstack_debian_repository",
+    "__install_saltstack_debian_onedir_repository",
+]
+
+SAMPLE_SALT_SOURCES = """\
+X-Repolib-Name: Salt Project
+Types: deb
+URIs: https://packages.broadcom.com/artifactory/saltproject-deb
+Signed-By: /etc/apt/keyrings/salt-archive-keyring.pgp
+Suites: stable
+Components: main
+"""
+
+
+def _bash_has_gnu_sed():
+    # Check through "bash -c", the exact invocation the test below uses, since
+    # e.g. on GitHub's Windows runners plain "sed" on the host PATH is Git
+    # Bash's GNU sed, but "bash" on the host PATH resolves to the WSL launcher
+    # stub instead - a different, often broken, resolution path.
+    try:
+        result = subprocess.run(
+            ["bash", "-c", "sed --version"],
+            stdout=subprocess.PIPE,
+            stderr=subprocess.PIPE,
+            universal_newlines=True,
+        )
+    except FileNotFoundError:
+        return False
+    return "GNU sed" in result.stdout
+
+
+def test_debian_repo_functions_rewrite_custom_repo_url(tmp_path):
+    """
+    Regression test for https://github.com/saltstack/salt-bootstrap/issues/2123
+    The -R/_CUSTOM_REPO_URL option must rewrite the "URIs:" line in
+    salt.sources for Debian/Ubuntu, not just the GPG key fetch URL.
+    """
+    if not _bash_has_gnu_sed():
+        # bootstrap-salt.sh's Debian/Ubuntu sed -i syntax targets GNU sed,
+        # which is what those distros actually ship. BSD sed (e.g. on macOS)
+        # parses "-i" differently, and isn't representative of the real
+        # target either way.
+        pytest.skip("bash with GNU sed not available")
+
+    bootstrap_script = os.path.join(
+        os.path.dirname(__file__), "..", "..", "bootstrap-salt.sh"
+    )
+    if not os.path.exists(bootstrap_script):
+        pytest.skip("bootstrap-salt.sh not found (not running from a repo checkout)")
+
+    with open(bootstrap_script) as fp:
+        script = fp.read()
+
+    for func_name in DEBIAN_REPO_FUNCTIONS:
+        match = re.search(
+            rf"^{re.escape(func_name)}\(\) {{(.*?)^}}", script, re.M | re.S
+        )
+        assert match, f"could not find {func_name}() in bootstrap-salt.sh"
+
+        sed_exprs = re.findall(
+            r'sed -i "([^"]+)" /etc/apt/sources\.list\.d/salt\.sources',
+            match.group(1),
+        )
+        assert sed_exprs, f"{func_name} has no salt.sources sed post-processing"
+
+        sources_file = tmp_path / f"{func_name}.sources"
+        sources_file.write_text(SAMPLE_SALT_SOURCES)
+
+        env = dict(os.environ, _REPO_URL="repo.example.com/myrepo", HTTP_VAL="https")
+        for expr in sed_exprs:
+            subprocess.run(
+                ["bash", "-c", f'sed -i "{expr}" "$1"', "--", str(sources_file)],
+                env=env,
+                check=True,
+            )
+
+        result = sources_file.read_text()
+        assert "packages.broadcom.com" not in result, (
+            f"{func_name}: salt.sources still references packages.broadcom.com "
+            f"after applying its sed commands:\n{result}"
+        )
+        assert "repo.example.com/myrepo" in result