Set default installable
Set default installable

Thus

  $ nix build -f foo.nix

will build foo.nix.

And

  $ nix build

will build default.nix. However, this may not be a good idea because
it's kind of inconsistent, given that "nix build foo" will build the
"foo" attribute from the default installation source (i.e. the
synthesis of $NIX_PATH), rather than ./default.nix. So I may revert
this.

ehmry/nix,dezgeg/nix,rycee/nix,shlevy/nix,ehmry/nix,NixOS/nix,dtzWill/nix,layus/nix,peti/nix,bennofs/nix,layus/nix,peti/nix,shlevy/nix,layus/nix,pikajude/nix,vcunat/nix,ehmry/nix,NixOS/nix,ehmry/nix,vcunat/nix,ehmry/nix,bennofs/nix,shlevy/nix,bennofs/nix,zimbatm/nix,rycee/nix,ehmry/nix,dtzWill/nix,peti/nix,dezgeg/nix,zimbatm/nix,layus/nix,rycee/nix,shlevy/nix,vcunat/nix,pikajude/nix,layus/nix,NixOS/nix,vcunat/nix,peti/nix,dezgeg/nix,rycee/nix,zimbatm/nix,dezgeg/nix,dtzWill/nix,zimbatm/nix,bennofs/nix,dtzWill/nix,dtzWill/nix,NixOS/nix,shlevy/nix,pikajude/nix,dezgeg/nix,rycee/nix,peti/nix,NixOS/nix