$ nix-prefetch-git
/nix/store/7k7wanhlkwzwaj55dirf9r0291z02hng-bash-4.2-p49/bin/bash: error importing function definition for `BASH_FUNC_module()'

$ env
# ...
BASH_FUNC_module()=() {  eval `/usr/share/Modules/$MODULE_VERSION/bin/modulecmd bash $*`
}
BASH_FUNC_mc()=() {  . /usr/share/mc/mc-wrapper.sh
}
# ...