Nixpkgs: flatpak-builder rofiles-fuse not available, doing without

[piotr-szegda]

Describe the bug
flatpak-builder for some reasons can't use rofiles-fuse

To Reproduce
Steps to reproduce the behavior:

1. Try build any app using flatpak-builder

Expected behavior
flatpak-builder should use rofiles-fuse.

Screenshots

Additional context

Metadata

• system: "x86_64-linux"
• host os: Linux 5.3.10, NixOS, 19.09.1208.ef8c34c4721 (Loris)
• multi-user?: yes
• sandbox: yes
• version: nix-env (Nix) 2.3
• channels(root): "nixos-19.09.1208.ef8c34c4721"
• channels(piotrek): "home-manager"
• nixpkgs: /nix/var/nix/profiles/per-user/root/channels/nixos

Maintainer information:

# a list of nixpkgs attributes affected by the problem
attribute:
# a list of nixos modules affected by the problem
module:

[piotr-szegda]

installing nixos.ostree solve this problem so maybe should be added?

[worldofpeace]

@piotr-szegda We patch the paths to the executables to be hardcoded, so the program doesn't have to rely on something like ostree being installed.

I believe one path isn't hardcoded with the current patch

• https://github.com/flatpak/flatpak-builder/blob/1.0.9/src/builder-context.c#L259

That looks it up in PATH, probably why it was working once you installed it.

[worldofpeace]

cc @jtojnar

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[jtojnar]

93041 should fix that issue.