Fix RPM build
Fix RPM build

We don't install a nix.conf anymore.

http://hydra.nixos.org/build/10826143

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