agent claude-code is built without its alsa-lib LD_LIBRARY_PATH wrapper

nix/claude-code-no-alsa.nix

@@ -0,0 +1,25 @@
+# `claude-code` without the `--prefix LD_LIBRARY_PATH` alsa-lib entry
+# nixpkgs adds to its wrapper. The wrapper exports the variable into
+# claude's own environment, so every shell claude spawns inherits an
+# alsa-lib `lib` dir that shadows the libraries newer nixpkgs binaries
+# (headless chromium) were built against. Agents have no audio device,
+# so alsa-lib is not needed. Every other wrapper flag stays.
+#
+# nixpkgs gives no switch for it (`alsa-lib` only feeds that one
+# `makeLibraryPath`), so the line is dropped from `installPhase`. A
+# package whose `installPhase` has no such line comes back unchanged.
+lib: claudeCode:
+let
+  marker = "--prefix LD_LIBRARY_PATH";
+  dropMarker =
+    phase:
+    lib.concatStringsSep "\n" (
+      builtins.filter (l: !(lib.hasInfix marker l)) (lib.splitString "\n" phase)
+    );
+in
+if lib.hasInfix marker (claudeCode.installPhase or "") then
+  claudeCode.overrideAttrs (old: {
+    installPhase = dropMarker old.installPhase;
+  })
+else
+  claudeCode