Add CC, CFLAGS, CCSHARED, CXX, CPPFLAGS, LDFLAGS, PKG_CONFIG and PKG_CONFIG_SYSROOT_DIR to the default passed through environment variables list as these are needed for building various C-extensions - by gaborbernat.
Add CC, CFLAGS, CCSHARED, CXX, CPPFLAGS, LDFLAGS, PKG_CONFIG and PKG_CONFIG_SYSROOT_DIR to the default passed through environment variables list as these are needed for building various C-extensions - by gaborbernat.