diff --git a/.circleci/config.yml b/.circleci/config.yml
index f774f04c78..33ea8992ae 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -861,7 +861,7 @@ jobs:
           name: Setup Python env
           command: |
             make setup-python
-            .venv3.13/bin/pip install ziglang
+            .venv3.13/bin/pip install ziglang==0.15.2
       - run:
           name: Install additional targets
           command: |
@@ -876,6 +876,13 @@ jobs:
             for target in $TARGETS; do
               make build-python-wheel GLEAN_BUILD_TARGET="$target" GLEAN_BUILD_EXTRA="--zig"
             done
+      - run:
+          name: Halt unless release
+          command: |
+            if [ -z "${CIRCLE_TAG}" ]; then
+              # Don't upload anything unless we're doing a release
+              circleci-agent step halt
+            fi
       - run:
           name: Upload wheels
           command: |
@@ -1053,6 +1060,8 @@ workflows:
           filters: *ci-filters
       - Python Windows x86_64 tests:
           filters: *ci-filters
+      - pypi-linux-additional-releases:
+          filters: *ci-filters
 
       - Generate Rust documentation:
           filters: *ci-only
diff --git a/glean-core/python/requirements_dev.txt b/glean-core/python/requirements_dev.txt
index 1bf9d008a5..38b31646ab 100644
--- a/glean-core/python/requirements_dev.txt
+++ b/glean-core/python/requirements_dev.txt
@@ -12,5 +12,5 @@ semver==2.13.0
 setuptools-git==1.2
 twine==6.0.1
 wheel==0.47.0
-maturin==1.13.1
+maturin==1.12.6
 patchelf>=0.17; sys_platform == "linux"