Changes to default.nix to be able to use Dune.
Changes to default.nix to be able to use Dune.

ejgallego/coq,gares/coq,ppedrot/coq,silene/coq,ppedrot/coq,JasonGross/coq,silene/coq,maximedenes/coq,JasonGross/coq,ppedrot/coq,Zimmi48/coq,JasonGross/coq,SkySkimmer/coq,SkySkimmer/coq,Zimmi48/coq,coq/coq,coq/coq,silene/coq,coq/coq,Matafou/coq,coq/coq,ppedrot/coq,Matafou/coq,gares/coq,gares/coq,gares/coq,maximedenes/coq,Matafou/coq,gares/coq,ejgallego/coq,ejgallego/coq,Zimmi48/coq,ejgallego/coq,SkySkimmer/coq,ppedrot/coq,maximedenes/coq,SkySkimmer/coq,Zimmi48/coq,maximedenes/coq,JasonGross/coq,maximedenes/coq