diff --git a/.ci/ios.sh b/.ci/ios.sh
index 92e1776c8..8a0d23497 100755
--- a/.ci/ios.sh
+++ b/.ci/ios.sh
@@ -1,5 +1,10 @@
 #!/bin/bash -ex
 
+# TODO: Work around pip install issues with Python 3.12 in the GitHub runner image.
+# See: https://github.com/actions/runner-images/issues/8709
+PYTHON_PATH=$(brew --prefix python@3.11)
+export PATH=$PYTHON_PATH/bin:$PYTHON_PATH/libexec/bin:$PATH
+
 mkdir build && cd build
 cmake .. -GNinja \
     -DCMAKE_BUILD_TYPE=Release \
diff --git a/.ci/macos.sh b/.ci/macos.sh
index c4e2a284b..99a348730 100755
--- a/.ci/macos.sh
+++ b/.ci/macos.sh
@@ -1,5 +1,10 @@
 #!/bin/bash -ex
 
+# TODO: Work around pip install issues with Python 3.12 in the GitHub runner image.
+# See: https://github.com/actions/runner-images/issues/8709
+PYTHON_PATH=$(brew --prefix python@3.11)
+export PATH=$PYTHON_PATH/bin:$PYTHON_PATH/libexec/bin:$PATH
+
 mkdir build && cd build
 cmake .. -GNinja \
     -DCMAKE_BUILD_TYPE=Release \