Hi, I'm not sure when this has been put into configure.py as I have had taken my eyes of the ball lately regarding Windows builds. But it seems that during bootstrap build the configure.py step is now doing more than just configuring modules. On my PC the excerpt below from stdout shows an error during the configure.py step Processing: "c:\busers\oeffner\nightlybuild\x32\current\modules\dials\libtbx_refresh.py" requires mock>=2.0, has 2.0.0 requirement orderedset is not currently met, package not installed attempting install of orderedset... Collecting orderedset Using cached orderedset-2.0.1.tar.gz Installing collected packages: orderedset Running setup.py install for orderedset: started Running setup.py install for orderedset: finished with status 'error' Complete output from command C:\Busers\oeffner\NightlyBuild\x32\Current\base\bin\python\python.exe -u -c "import setuptools, tokenize;__file__='c:\\users\\oeffner\\appdata\\local\\temp\\pip-build-smhifw\\orderedset\\setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record c:\users\oeffner\appdata\local\temp\pip-0seb8q-record\install-record.txt --single-version-externally-managed --compile: running install running build running build_py creating build creating build\lib.win32-2.7 creating build\lib.win32-2.7\orderedset copying lib\orderedset\__init__.py -> build\lib.win32-2.7\orderedset running build_ext building 'orderedset._orderedset' extension error: Microsoft Visual C++ 9.0 is required (Unable to find vcvarsall.bat). Get it from http://aka.ms/vcpython27 ---------------------------------------- Command "C:\Busers\oeffner\NightlyBuild\x32\Current\base\bin\python\python.exe -u -c "import setuptools, tokenize;__file__='c:\\users\\oeffner\\appdata\\local\\temp\\pip-build-smhifw\\orderedset\\setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record c:\users\oeffner\appdata\local\temp\pip-0seb8q-record\install-record.txt --single-version-externally-managed --compile" failed with error code 1 in c:\users\oeffner\appdata\local\temp\pip-build-smhifw\orderedset\ You are using pip version 9.0.1, however version 9.0.3 is available. You should consider upgrading via the 'python -m pip install --upgrade pip' command. install failed. please check manually My first concern with this approach is that the bootstrap process doesn't stop. It carries on and eventually builds the Phenix software suite. This may or may not be a broken build as it is not clear whether the above failure to build orderedset was a showstopper for something. Secondly, I thought that modules would not be installed anywhere else than when building base components or when downloading sources. For a small project it is a nice and sneaky solution to have certain build steps second guessing what dependencies are missing and then installing them "on the fly", if not covertly. But for a large project such as CCTBX with several teams using that as a common framework this becomes messy I would argue. A quick and dirty fix for the above error might be just to put vcvarsall.bat in the PATH environment. But that is not a solution since bootstrap.py has been fashioned to use different versions of Visual C++, some of which are not invoked through a vcvarsall.bat file. I appreciate the need to install additional component modules for python. But would it not be more tidy to install these during the base step of the bootstrap process? Is there any reason why this cannot happen? Regards, Rob -- Robert Oeffner, Ph.D. Research Associate, The Read Group Department of Haematology, Cambridge Institute for Medical Research University of Cambridge Cambridge Biomedical Campus Wellcome Trust/MRC Building Hills Road Cambridge CB2 0XY www.cimr.cam.ac.uk/investigators/read/index.html tel: +44(0)1223 763234