################################### Troubleshooting installation issues ################################### Sometimes, things go south. When installing the development sandbox by typing:: make virtualenv-dev Building wheels for collected packages: pycrypto:: src/_fastmath.c:36:11: fatal error: 'gmp.h' file not found # include ^~~~~~~ 197 warnings and 1 error generated. Solution:: export CPPFLAGS=-I/usr/local/opt/gmp/include export LDFLAGS=-L/usr/local/opt/gmp/lib make virtualenv-dev