Describe the bug

The dev environment for fwupd contains an inexplicably high number of the same compiler flags, causing an extreme amount of compiler warnings if using meson setup build && ninja -C build inside of it.

Steps To Reproduce

Steps to reproduce the behavior:

$ nix print-dev-env nixpkgs#fwupd | grep -o -- '-Wno-incompatible-function-pointer-types' | wc -l
523

To see flood of compiler messages:

$ nix-shell '<nixpkgs>' -A fwupd
$ eval "${unpackPhase:-unpackPhase}"
$ cd $sourceRoot
$ eval "${patchPhase:-patchPhase}"
$ meson setup --prefix $out $mesonFlags build
$ ninja -C build

Expected behavior

I think that $NIX_CFLAGS_COMPILE should not contain duplicate items. I have honestly no clue how this happens from looking at the fwupd package in nixpkgs.

Notify maintainers

@r-vdp

Metadata

Please run nix-shell -p nix-info --run "nix-info -m" and paste the result.

[user@system:~]$ nix-shell -p nix-info --run "nix-info -m"
 - system: `"x86_64-linux"`
 - host os: `Linux 6.8.2, NixOS, 24.05 (Uakari), 24.05.20240403.7781caa`
 - multi-user?: `yes`
 - sandbox: `yes`
 - version: `nix-env (Nix) 2.18.2`
 - nixpkgs: `/etc/nix/inputs/nixpkgs`

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