lldb: Fix dependency cycle between out and lib outputs (#380775)

pkgs/development/compilers/llvm/common/lldb.nix

@@ -54,9 +54,10 @@ stdenv.mkDerivation (rec {
   src = src';
   inherit patches;
 
-  # LLDB expects to find the path to `bin` relative to `lib` on Darwin. It can’t be patched with the location of
-  # the `lib` output because that would create a cycle between it and the `out` output.
-  outputs = [ "out" "dev" ] ++ lib.optionals (!stdenv.hostPlatform.isDarwin) [ "lib" ];
+  # There is no `lib` output because some of the files in `$out/lib` depend on files in `$out/bin`.
+  # For example, `$out/lib/python3.12/site-packages/lldb/lldb-argdumper` is a symlink to `$out/bin/lldb-argdumper`.
+  # Also, LLDB expects to find the path to `bin` relative to `lib` on Darwin.
+  outputs = [ "out" "dev" ];
 
   sourceRoot = lib.optional (lib.versionAtLeast release_version "13") "${src.name}/${pname}";
 
@@ -140,7 +141,7 @@ stdenv.mkDerivation (rec {
   '';
 
   postInstall = ''
-    wrapProgram $out/bin/lldb --prefix PYTHONPATH : $lib/${python3.sitePackages}/
+    wrapProgram $out/bin/lldb --prefix PYTHONPATH : ''${!outputLib}/${python3.sitePackages}/
 
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