diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 41c5d045..c11f0bcc 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -203,16 +203,16 @@ lint_format_safety_bandit_checks:
 
 
 lint_mypy:
-  image: debian:bullseye
+  image: debian:bullseye-backports
   <<: *apt-template
   script:
-    - sed -i '/pyjks/d' setup.py  # TODO get from backports once available
     # use Debian packages to avoid building C/rust sources
     - apt-get install
           mypy
           python3-cryptography
           python3-pip
           python3-wheel
+    - apt-get install -t bullseye-backports python3-pyjks
     - pip install -e .[test]
     - mypy
 
diff --git a/buildserver/provision-android-sdk b/buildserver/provision-android-sdk
index 4814ca40..e8fa1834 100644
--- a/buildserver/provision-android-sdk
+++ b/buildserver/provision-android-sdk
@@ -117,6 +117,11 @@ cat <<EOF > $ANDROID_HOME/licenses/android-sdk-preview-license-old
 84831b9409646a918e30573bab4c9c91346d8abd
 EOF
 
+cat <<EOF > $ANDROID_HOME/licenses/intel-android-extra-license
+
+d975f751698a77b662f1254ddbeed3901e976f5a
+EOF
+
 echo y | $ANDROID_HOME/tools/bin/sdkmanager "extras;m2repository;com;android;support;constraint;constraint-layout;1.0.1"
 echo y | $ANDROID_HOME/tools/bin/sdkmanager "extras;m2repository;com;android;support;constraint;constraint-layout-solver;1.0.1"
 echo y | $ANDROID_HOME/tools/bin/sdkmanager "extras;m2repository;com;android;support;constraint;constraint-layout;1.0.2"
diff --git a/fdroidserver/mirror.py b/fdroidserver/mirror.py
index 3187a3d3..27603a85 100644
--- a/fdroidserver/mirror.py
+++ b/fdroidserver/mirror.py
@@ -27,6 +27,7 @@ def _run_wget(path, urls):
     if not urls:
         return
     logging.debug(_('Running wget in {path}').format(path=path))
+    cwd = os.getcwd()
     os.makedirs(path, exist_ok=True)
     os.chdir(path)
     urls_file = '.fdroid-mirror-wget-input-file'
@@ -43,6 +44,7 @@ def _run_wget(path, urls):
         ]
     )
     os.remove(urls_file)
+    os.chdir(cwd)  # leave the working env the way we found it
 
 
 def main():