Also replace the monolitic derivation hol_light_binaries with smaller
derivations. Now the installation works as follows:
# Install the base system and a script "start_hol_light"
$ nix-env -i hol_light_sources hol_light
# Install a checkpointed executable with the core library preloaded
$ nix-env -i hol_light_core_dmtcp
# Install HOL Light binaries preloaded with other specific libraries:
$ nix-env -i hol_light_multivariate_dmtcp
$ nix-env -i hol_light_complex_dmtcp
$ nix-env -i hol_light_sosa_dmtcp
$ nix-env -i hol_light_card_dmtcp
svn path=/nixpkgs/trunk/; revision=23815
4e5db40581