1.21.2

Bug fixes / Improvements:

• revert some MSVC activation logic to still call vcvarsall directly in build script
• fix Windows testing for binary prefix replacement (not done on win)
• Add a warning message when conda-build can't create an environment due to unsatisfiable dependencies
• Improve notion of whether a recipe uses a VCS in its metadata, or in its build

Known issues:

• Environment activation on Windows will not work until Conda 4.1.4 is released. The activate.bat script does not look in the right place for the activate.d folder.
• The test suite on Linux and Mac fails the python-build, python-run, and python-build-run tests, because an errant __conda-version__.txt file is somehow present. It is not clear where it comes from, and each of these tests pass when run individually. If you have mysterious issues, and you use __conda-version__.txt or files like it, please file an issue.

Contributors:

• @msarahan
• @patricksnape