, nixpkgs ? builtins.fetchGit { url = https://github.com/NixOS/nixpkgs-channels.git; ref = "nixos-19.09-small"; }

, nixpkgs ? builtins.fetchTarball https://github.com/NixOS/nixpkgs/archive/release-19.09.tar.gz

      NIX_LDFLAGS = [
          "-lpthread"
	];

      NIX_LDFLAGS = [ "-lpthread" ];

            auto v = findAlongAttrPath(state, attrPath, autoArgs, *vRoot).first;

            auto v = findAlongAttrPath(state, attrPath, autoArgs, *vRoot);

                if (a && state.forceBool(*a->value, *a->pos)) {

                if (a && state.forceBool(*(*a)->value, *(*a)->pos)) {

                    state.coerceToString(*a->pos, *a->value, context, true, false);

                    state.coerceToString(*(*a)->pos, *(*a)->value, context, true, false);

                    state.forceList(*a->value, *a->pos);
                    for (unsigned int n = 0; n < a->value->listSize(); ++n) {
                        auto v = a->value->listElems()[n];

                    state.forceList(*(*a)->value, *(*a)->pos);
                    for (unsigned int n = 0; n < (*a)->value->listSize(); ++n) {
                        auto v = (*a)->value->listElems()[n];