derivation: Don't require certain function arguments
derivation: Don't require certain function arguments

Turns out that in Nixpkgs, derivation is actually called without a
‘name’ argument in some places :-(

tchajed/nix,zimbatm/nix,puffnfresh/nix,puffnfresh/nix,garbas/nix,jcumming/nix,dtzWill/nix,bjornfor/nix,vizanto/nix,vcunat/nix,peti/nix,pikajude/nix,puffnfresh/nix,wmertens/nix,NixOS/nix,acowley/nix,layus/nix,garbas/nix,dtzWill/nix,layus/nix,peti/nix,ttuegel/nix,bennofs/nix,ehmry/nix,offlinehacker/nix,dezgeg/nix,dezgeg/nix,gebner/nix,layus/nix,garbas/nix,jcumming/nix,ttuegel/nix,wmertens/nix,vizanto/nix,gridaphobe/nix,vizanto/nix,aucampia/nix,ysangkok/nix,acowley/nix,acowley/nix,joelmo/nix,wmertens/nix,gebner/nix,NixOS/nix,ttuegel/nix,aucampia/nix,NixOS/nix,bennofs/nix,nbp/nix,NixOS/nix,jcumming/nix,joelmo/nix,gridaphobe/nix,rowhit/nix,gebner/nix,acowley/nix,ehmry/nix,pikajude/nix,pikajude/nix,peti/nix,dezgeg/nix,joelmo/nix,ysangkok/nix,shlevy/nix,zimbatm/nix,aucampia/nix,rycee/nix,shlevy/nix,rowhit/nix,rowhit/nix,nbp/nix,rowhit/nix,layus/nix,gebner/nix,joelmo/nix,zimbatm/nix,rycee/nix,bennofs/nix,bjornfor/nix,bjornfor/nix,puffnfresh/nix,offlinehacker/nix,dtzWill/nix,ehmry/nix,vcunat/nix,shlevy/nix,ehmry/nix,shlevy/nix,zimbatm/nix,offlinehacker/nix,NixOS/nix,nbp/nix,wmertens/nix,bennofs/nix,rycee/nix,layus/nix,jcumming/nix,garbas/nix,ttuegel/nix,tchajed/nix,peti/nix,gridaphobe/nix,rycee/nix,garbas/nix,aucampia/nix,vizanto/nix,dtzWill/nix,peti/nix,ehmry/nix,dezgeg/nix,tchajed/nix,gridaphobe/nix,dezgeg/nix,ehmry/nix,rycee/nix,vcunat/nix,vcunat/nix,ysangkok/nix,offlinehacker/nix,dtzWill/nix,shlevy/nix,bjornfor/nix,nbp/nix,tchajed/nix