From e40fe634b1a7aa33e278b1404ee02dea12277080 Mon Sep 17 00:00:00 2001
From: atalman <atalman@fb.com>
Date: Fri, 3 Oct 2025 15:01:35 +0000
Subject: [PATCH] Pin conda version for Docker builds (#164575)

Mitigates https://github.com/pytorch/pytorch/issues/164574
Remove unused CUDA_CHANNEL var - this was used before when we had  pytorch install via conda.

Please note: CUDA 13.0 failures are expected since the CI tries to build against prod and CUDA 13.0 is not available in prod yet.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/164575
Approved by: https://github.com/malfet, https://github.com/Camyll
---
 Dockerfile | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/Dockerfile b/Dockerfile
index 7b8964bd860e..f73dfcc1af3a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -50,11 +50,10 @@ RUN git submodule update --init --recursive
 FROM conda as conda-installs
 ARG PYTHON_VERSION=3.11
 ARG CUDA_PATH=cu121
-ARG CUDA_CHANNEL=nvidia
 ARG INSTALL_CHANNEL=whl/nightly
 # Automatically set by buildx
-RUN /opt/conda/bin/conda update -y -n base -c defaults conda
-RUN /opt/conda/bin/conda install -y python=${PYTHON_VERSION}
+# pinning version of conda here see: https://github.com/pytorch/pytorch/issues/164574
+RUN /opt/conda/bin/conda install -c "${INSTALL_CHANNEL}" -y python=${PYTHON_VERSION} conda=25.7.0
 
 ARG TARGETPLATFORM