We now need crypt.h to run CI with Python 2

Author: benmwebb

support/setup_ci.sh

@@ -21,11 +21,14 @@ fi
 if [ ${python_version} = "2.7" ]; then
   BOOST=""
   pip="pip<=19.3.1"
+  # Python.h includes crypt.h, which is no longer provided by default
+  crypt="libxcrypt"
 else
   BOOST="libboost-devel"
   pip="pip"
+  crypt=""
 fi
-conda create --yes -q -n python${python_version} -c salilab python=${python_version} ${pip} ${IMP_CONDA} ${BOOST} gxx_linux-64 eigen cereal swig cmake numpy
+conda create --yes -q -n python${python_version} -c salilab python=${python_version} ${pip} ${crypt} ${IMP_CONDA} ${BOOST} gxx_linux-64 eigen cereal swig cmake numpy
 eval "$(conda shell.bash hook)"
 conda activate python${python_version}