Work log 2016-07-25

Screw bash substitution; use Python, it’s much faster. Perl would be even faster, but I’m not a Perl monk :(

Regarding 2 prior issues:

• Adding builtins.unsafeDiscardStringContext to runScript seems to appease Hydra and eval.sh regarding strings referring to store paths.
• NIX_REMOTE command output wasn’t being read. We were doing NIX_REMOTE=/nix/store/...-result rather than NIX_REMOTE=daemon