Fix warning about non-existant -I directories
Fix warning about non-existant -I directories

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