replace unar with dtrx

the former is costly to (cross-)compile

hosts/common/programs/assorted.nix

@@ -72,6 +72,7 @@
         # "cdrtools"
         "clinfo"
         "dmidecode"
+        "dtrx"  # `unar` alternative, "Do The Right eXtraction"
         "efivar"
         # "flashrom"
         "fwupd"
@@ -106,7 +107,7 @@
         # "ssh-to-age"
         "sudo"
         # "tageditor"  # music tagging
-        "unar"
+        # "unar"
         "wireguard-tools"
         "xdg-terminal-exec"
         "xdg-utils"  # for xdg-open

nixpatches/list.nix

@@ -264,6 +264,17 @@ in [
     hash = "sha256-fAZpduh3JZeFixJ4yX0wkh/GRp0gYKsTT+XkNdpK7CU=";
   })
 
+  (fetchpatch' {
+    title = "dtrx: 8.5.1 -> 8.5.3";
+    saneCommit = "eba9bbc251db942ae27f87824cae643b5f3198c2";
+    hash = "sha256-wgpjUXQ/ZnRY5AJ9xOL2BToA7hDaokDiMmPkMt0Y5go=";
+  })
+  (fetchpatch' {
+    title = "dtrx: don't double-wrap the binary";
+    saneCommit = "97a9d12b6c31a58e9067eae7cdcd3f53055c124c";
+    hash = "sha256-g+p96OrBOQAwwH7nwHBuM/KGeIrnBzh9u9lL0M0sYWo=";
+  })
+
   # (fetchpatch' {
   #   # N.B.: compiles, but runtime error on launch suggestive of some module not being shipped
   #   title = "matrix-appservice-irc: 0.38.0 -> 1.0.0";

overlays/cross.nix

@@ -1212,6 +1212,13 @@ in {
     # rmlint is scons; it reads the CC environment variable, though, so *may* be cross compilable
     inherit (emulated) stdenv;
   };
+  rpm = prev.rpm.overrideAttrs (upstream: {
+    # fixes "python too old". might also be specifiable as a configure flag?
+    env = upstream.env // {
+      PYTHON = final.python3.interpreter;
+    };
+  });
+
   # samba = prev.samba.overrideAttrs (_upstream: {
   #   # we get "cannot find C preprocessor: aarch64-unknown-linux-gnu-cpp", but ONLY when building with the ccache stdenv.
   #   # this solves that, but `CPP` must be a *single* path -- not an expression.