Pin pip version in conda envs to 25.2

25.3 removes the --no-use-pep517 argument, and this breaks the Docker builds
as torchaudio and torchvision cannot build without it.

Author: PetarTerziev-UL

.ci/docker/common/install_conda.sh

@@ -35,7 +35,9 @@ install_miniconda() {
 install_python() {
   pushd /opt/conda
   # Install the selected Python version for CI jobs
-  as_ci_user conda create -n "py_${PYTHON_VERSION}" -y --file /opt/conda/conda-env-ci.txt python="${PYTHON_VERSION}"
+  # pip is pinned to 25.2, as 25.3 removes the --no-use-pep517 arg to the install subcommand,
+  # and this is required to install torchaudio and torchvision.
+  as_ci_user conda create -n "py_${PYTHON_VERSION}" -y --file /opt/conda/conda-env-ci.txt python="${PYTHON_VERSION}" pip=25.2
 
   # From https://github.com/pytorch/pytorch/blob/main/.ci/docker/common/install_conda.sh
   if [[ $(uname -m) == "aarch64" ]]; then

.ci/docker/common/utils.sh

@@ -17,7 +17,10 @@ conda_install() {
   # Ensure that the install command don't upgrade/downgrade Python
   # This should be called as
   #   conda_install pkg1 pkg2 ... [-c channel]
-  as_ci_user conda install -q -n "py_${PYTHON_VERSION}" -y python="${PYTHON_VERSION}" "$@"
+  #
+  # pip is pinned to 25.2, as 25.3 removes the --no-use-pep517 arg to the install subcommand,
+  # and this is required to install torchaudio and torchvision.
+  as_ci_user conda install -q -n "py_${PYTHON_VERSION}" -y python="${PYTHON_VERSION}" pip=25.2 "$@"
 }
 
 conda_run() {