feat: remove libarchieve crate depenency

support/gen-libarchive-sys.nix

@@ -0,0 +1,19 @@
+{ pkgs, zig }:
+pkgs.stdenvNoCC.mkDerivation {
+  name = "libarchive-sys-rs";
+  src = ../gen_libarchive_sys.zig;
+  dontUnpack = true;
+  nativeBuildInputs = [ zig ];
+  ZIG_GLOBAL_CACHE_DIR = "/build/.zig-cache";
+  ZIG_LOCAL_CACHE_DIR = "/build/.zig-cache-local";
+  buildPhase = ''
+    ${zig}/zig run "$src" \
+      -target x86_64-linux-musl \
+      -lc -OReleaseFast -fstrip \
+      -I${pkgs.libarchive.dev}/include \
+      > libarchive_sys.rs
+  '';
+  installPhase = ''
+    cp libarchive_sys.rs "$out"
+  '';
+}