diff --git a/VERSION b/VERSION
index 0b2eb36..c1e43e6 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-3.7.2
+3.7.3
diff --git a/install.sh b/install.sh
index acca556..e81352a 100755
--- a/install.sh
+++ b/install.sh
@@ -25,7 +25,7 @@ from urllib.parse import urljoin
 from urllib.request import Request, urlopen
 
 
-VERSION = "3.7.2"
+VERSION = "3.7.3"
 REPOSITORY = "https://raw.githubusercontent.com/kimdzhekhon/Universal-Build-Script"
 RELEASE_REF = os.environ.get("UBS_INSTALL_REF", f"v{VERSION}")
 BASE_URL = os.environ.get("UBS_INSTALL_BASE_URL", f"{REPOSITORY}/{RELEASE_REF}").rstrip("/") + "/"
diff --git a/scripts/ubs.py b/scripts/ubs.py
index ad426ee..a9e0e74 100755
--- a/scripts/ubs.py
+++ b/scripts/ubs.py
@@ -1239,17 +1239,17 @@ def pattern_static_prefix(pattern: str) -> Optional[str]:
 
 
 def preferred_output_roots(project: Project, artifacts: Sequence[Path]) -> List[Path]:
-    """Derive common output roots per project type straight from ARTIFACT_PATTERNS.
+    """Derive output roots per project type straight from ARTIFACT_PATTERNS.
 
     Only prefixes that actually produced an artifact this build are considered,
     so a single-output build (e.g. just an .aab) opens its own specific folder
-    instead of the noisy shared "build" root. Prefixes sharing the same
-    top-level path segment are collapsed to their common ancestor only when
-    more than one of them has real output (e.g. flutter producing both an
-    .aab and build/web), while prefixes under different top-level segments
-    stay separate (e.g. tauri's "src-tauri/..." and "signing/build").
+    instead of the noisy shared "build" root. Two prefixes are only merged
+    when one is an ancestor of the other (nesting) — separate output types
+    that merely share a top-level segment (e.g. flutter's aab under
+    build/app/outputs/... and ipa under build/ios/ipa) stay as distinct
+    folders instead of collapsing to that shared segment.
     """
-    groups: Dict[str, List[str]] = {}
+    resolved_prefixes: List[Path] = []
     for pattern in ARTIFACT_PATTERNS.get(project.type, []):
         prefix = pattern_static_prefix(pattern)
         if not prefix:
@@ -1257,8 +1257,22 @@ def preferred_output_roots(project: Project, artifacts: Sequence[Path]) -> List[
         resolved = (project.path / prefix).resolve()
         if not any(artifact == resolved or resolved in artifact.parents for artifact in artifacts):
             continue
-        groups.setdefault(prefix.split("/", 1)[0], []).append(prefix)
-    return [project.path / os.path.commonpath(prefixes) for prefixes in groups.values()]
+        resolved_prefixes.append(resolved)
+
+    roots: List[Path] = []
+    for resolved in resolved_prefixes:
+        merged = False
+        for index, existing in enumerate(roots):
+            if existing == resolved or existing in resolved.parents:
+                merged = True
+                break
+            if resolved in existing.parents:
+                roots[index] = resolved
+                merged = True
+                break
+        if not merged:
+            roots.append(resolved)
+    return roots
 
 
 def artifact_output_directories(project: Project) -> List[Path]:
diff --git a/scripts/update-manifest.txt b/scripts/update-manifest.txt
index 9cea6cf..dcae889 100644
--- a/scripts/update-manifest.txt
+++ b/scripts/update-manifest.txt
@@ -1,9 +1,9 @@
 # scripts/generate-update-manifest.sh로 생성합니다. 임의 편집하지 마세요.
-version 3.7.2
-file c6985d515b3473f1ea6ec6306d74ea3cb913b64740172689a8e2b1edde3ec9fc VERSION
+version 3.7.3
+file c5c590b00cd6c1d7a69736ea08aa29cdd07d75eae430122c5b6651d299368c49 VERSION
 file 62d7189d00ccadbdeae9647a37b80db6ed9e179bfcf5b2f1d4d1c487dbc815bf build.sh
-file 707238d61ab00e3531fd71e957231868a9518085e989286788e0deb49e875b9c install.sh
-file 520c92fc76c608368a8b474bca95c46875699981e4d61d579aa7daa80faaa828 scripts/ubs.py
+file ff3cddb9c631c23b1904a81bf363b9ff01fd373ff968a846aa4a4592b52b9b84 install.sh
+file a82c63e4116bac963d6745cf8e17dade5d95f4f7af543d481933cc5cc3e70129 scripts/ubs.py
 file df0231e3cc0e584be7ae3ade3f1c0a7f92afb2124ec8a15bdb51c76737bbe1e0 scripts/ubs_mcp.py
 file 0a3b9d28fbe62bc55c073f5337954ae92ffca7482fca5d1f681dc99333363416 scripts/bootstrap-update.sh
 file 7b9a21a0854e0ca0476ae6ee38f2b7fc552446c97448ee655995f91e5c6f23d5 scripts/build-rust-helper.sh
diff --git a/tests/test-update.sh b/tests/test-update.sh
index 54e55ec..9367ccb 100755
--- a/tests/test-update.sh
+++ b/tests/test-update.sh
@@ -146,8 +146,8 @@ assert result["schema_version"] == 1
 assert result["ok"] is True
 assert result["mode"] == "check"
 assert result["status"] == 0
-assert result["local_version"] == "3.7.2"
-assert result["remote_version"] == "3.7.2"
+assert result["local_version"] == "3.7.3"
+assert result["remote_version"] == "3.7.3"
 assert result["changed_paths"] == []
 assert result["backup_path"] is None
 assert isinstance(result["output"], list)
@@ -196,7 +196,7 @@ fi
 }
 
 # 원격 버전이 더 낮으면 명시적 허용 없이 적용하지 않아야 한다.
-sed 's/^version 3\.7\.2$/version 2.0.0/' "$REPO_DIR/scripts/update-manifest.txt" \
+sed 's/^version 3\.7\.3$/version 2.0.0/' "$REPO_DIR/scripts/update-manifest.txt" \
   > "$REMOTE/scripts/update-manifest.txt"
 if UBS_UPDATE_BASE_URL="file://$REMOTE" UBS_UPDATE_ALLOW_FILE=true \
   bash "$TARGET/build.sh" update --check >/dev/null 2>&1; then
diff --git a/tests/test_python_core.py b/tests/test_python_core.py
index a564054..3a743a5 100644
--- a/tests/test_python_core.py
+++ b/tests/test_python_core.py
@@ -33,17 +33,24 @@ def test_standard_streams_are_configured_for_utf8(self) -> None:
             encoding="utf-8", errors="backslashreplace",
         )
 
-    def test_flutter_artifacts_open_the_common_build_root(self) -> None:
+    def test_flutter_multiple_outputs_open_their_own_folders_not_shared_build_root(self) -> None:
         with tempfile.TemporaryDirectory() as temporary:
             root = Path(temporary).resolve()
-            output = root / "build/app/outputs/bundle/release"
-            output.mkdir(parents=True)
-            (output / "app-release.aab").write_bytes(b"bundle")
+            aab_output = root / "build/app/outputs/bundle/release"
+            aab_output.mkdir(parents=True)
+            (aab_output / "app-release.aab").write_bytes(b"bundle")
+            ipa_output = root / "build/ios/ipa"
+            ipa_output.mkdir(parents=True)
+            (ipa_output / "app.ipa").write_bytes(b"ipa")
             web = root / "build/web"
             web.mkdir(parents=True)
+            # Each output type gets its own folder — they must not collapse to
+            # the shared "build" segment, which would drag in unrelated
+            # plugin build caches that live under build/ regardless of which
+            # outputs were actually produced.
             self.assertEqual(
                 ubs.artifact_output_directories(ubs.Project("flutter", root)),
-                [root / "build"],
+                sorted([aab_output, ipa_output, web], key=str),
             )
 
     def test_flutter_single_output_opens_its_own_folder_not_whole_build(self) -> None: