fix(tvix/store): Remove virtiofs from default features r/6720

vhost-user-backend doesn't support macOS yet, so the virtiofs features
will not work on macOS. This removes it as a default feature which makes
`cargo build` work out of the box on macOS.

The `virtiofs` feature is enabled for Linux when building via Nix, but
if being built by cargo directly, the feature must be enabled via a
cargo flag.

Change-Id: I2aaca9582f8e3dbcf9ee5f1b9831d614909f3799
Reviewed-on: https://cl.tvl.fyi/c/depot/+/9555
Reviewed-by: flokli <flokli@flokli.de>
Tested-by: BuildkiteCI
Autosubmit: Connor Brewster <cbrewster@hey.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/tvix/default.nix b/tvix/default.nix
index 94f50b29ba80..34acde434a80 100644
--- a/tvix/default.nix
+++ b/tvix/default.nix
@@ -5,6 +5,8 @@ let
   # crate override for crates that need protobuf
   protobufDep = prev: (prev.nativeBuildInputs or [ ]) ++ [ pkgs.protobuf ];
   iconvDarwinDep = lib.optionals pkgs.stdenv.isDarwin [ pkgs.libiconv ];
+  # fuse-backend-rs uses DiskArbitration framework to handle mount/unmount on Darwin
+  diskArbitrationDep = lib.optionals pkgs.stdenv.isDarwin [ pkgs.buildPackages.darwin.apple_sdk.frameworks.DiskArbitration ];
 
   # Load the crate2nix crate tree.
   crates = import ./Cargo.nix {
@@ -44,6 +46,7 @@ let
       tvix-store = prev: {
         PROTO_ROOT = depot.tvix.proto;
         nativeBuildInputs = protobufDep prev;
+        buildInputs = prev.buildInputs or [ ] ++ diskArbitrationDep;
       };
     };
   };