Installing conda-build in base to fix failing nightly release

[TahaZahid05]

Description:

The failure was triggered by an update to Conda (version 26.3.1+). As noted in the Conda Release Notes, the following change was introduced:

• Deprecation: No longer search for conda-* executables on PATH when building the CLI parser.

Previously, the script installed conda-build into the active sub-environment. Since that sub-environment was on the PATH, Conda could find the conda-build executable and register the build command. With the new version, Conda ignores the PATH and only looks for plugins registered in the base environment.

Solution

Updated conda.recipe/build_and_upload.sh to explicitly install build dependencies into the base environment using the -n base flag. This ensures that the build command is correctly registered as a plugin for the main conda executable.

Reproduction Steps

I verified this fix locally by reproducing the failure on Conda 26.3.2 using these steps:

1. Reproduce the Failure:

# Ensure local conda is 26.3.2+
conda install -n base -y conda=26.3.2

# Ensure base is clean of build tools
conda remove -n base -y conda-build

# Install tools ONLY in a sub-environment
conda create -y -n reproduce_failure
conda install -y -n reproduce_failure conda-build

# Try to run build from the sub-environment
conda activate reproduce_failure
conda build --version

# RESULT: Fails with "invalid choice: 'build'"

2. Verify the Fix:

# Install tools into the base environment
conda install -y -n base conda-build

# Try again from the sub-environment
conda activate reproduce_failure
conda build --version

# RESULT: Success! (Prints conda-build version)

Check list:

• New tests are added (if a new feature is added)
• New doc strings: description and/or example code are in RST format
• Documentation is updated (if required)

[vfdev-5]

Thanks!