dust: fix

- Use `pixie` (the wrapper) rather than `pixie-vm` (the wrappee)
- Add `rlwrap` command rather than using `which`

Fixes #72129

pkgs/development/interpreters/pixie/dust.nix

@@ -1,4 +1,6 @@
-{ lib, stdenv, pixie, fetchFromGitHub }:
+{ lib, stdenv, fetchFromGitHub
+, pixie, rlwrap
+}:
 
 stdenv.mkDerivation rec {
   pname = "dust";
@@ -16,8 +18,9 @@ stdenv.mkDerivation rec {
   patches = [ ./make-paths-configurable.patch ];
 
   configurePhase = ''
-    pixiePath="${pixie}/bin/pixie-vm" \
+    pixiePath="${pixie}/bin/pixie" \
     basePath="$out/share/dust" \
+    rlwrapPath="${rlwrap}/bin/rlwrap" \
       substituteAll dust.in dust
     chmod +x dust
   '';

pkgs/development/interpreters/pixie/make-paths-configurable.patch

@@ -73,11 +73,12 @@ new file mode 100755
 index 0000000..44a7fbd
 --- /dev/null
 +++ b/dust.in
-@@ -0,0 +1,43 @@
+@@ -0,0 +1,40 @@
 +#!/usr/bin/env bash
 +
 +base_path=@basePath@
 +pixie_path=@pixiePath@
++rlwrap_cmd=@rlwrapPath@
 +
 +function set_load_path() {
 +    load_path=""
@@ -98,11 +99,7 @@ index 0000000..44a7fbd
 +
 +case $1 in
 +    ""|"repl")
-+        rlwrap_cmd=""
-+        if [ -n "`which rlwrap`" ]; then
-+            rlwrap_cmd="rlwrap -aignored -n"
-+        fi
-+        $rlwrap_cmd $pixie_path $load_path
++        $rlwrap_cmd -aignored -n $pixie_path $load_path
 +        ;;
 +    "run")
 +        shift