diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 46635374c..2c04f8336 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -25,15 +25,30 @@ jobs:
     - name: Checkout
       uses: actions/checkout@v4
       with:
+        fetch-depth: 0
         submodules: recursive
 
     # Set Git config
     - name: Git config
       run: git config --global --add safe.directory "$GITHUB_WORKSPACE"
 
+    # Normalize file mod times
+    - name: Restore timestamps
+      run: uv run https://raw.githubusercontent.com/MestreLion/git-tools/refs/tags/v2022.12/git-restore-mtime --merge --commit-time
+
     # Copy the original files to the workspace
     - name: Prepare
-      run: cp -R /orig .
+      run: cp -a /orig .
+
+    # Restore cached files
+    - name: Cache build
+      uses: actions/cache@v4
+      with:
+        path: |
+          build
+          .ninja_deps
+          .ninja_log
+        key: ${{ runner.os }}-${{ matrix.version }}
 
     # Build the project
     - name: Build
diff --git a/configure.py b/configure.py
index 94a3806ac..ac3e4592a 100755
--- a/configure.py
+++ b/configure.py
@@ -158,11 +158,11 @@ if args.no_asm:
 
 # Tool versions
 config.binutils_tag = "2.42-1"
-config.compilers_tag = "20250520"
+config.compilers_tag = "20250812"
 config.dtk_tag = "v1.6.2"
-config.objdiff_tag = "v3.0.0-beta.10"
+config.objdiff_tag = "v3.0.0-beta.14"
 config.sjiswrap_tag = "v1.2.1"
-config.wibo_tag = "0.6.16"
+config.wibo_tag = "0.7.0"
 
 # Project
 config.config_path = Path("config") / config.version / "config.yml"
diff --git a/tools/download_tool.py b/tools/download_tool.py
index 7adbf0d70..381b170a6 100755
--- a/tools/download_tool.py
+++ b/tools/download_tool.py
@@ -91,6 +91,7 @@ TOOLS: Dict[str, Callable[[str], str]] = {
     "wibo": wibo_url,
 }
 
+
 def download(url, response, output) -> None:
     if url.endswith(".zip"):
         data = io.BytesIO(response.read())
@@ -107,6 +108,7 @@ def download(url, response, output) -> None:
         st = os.stat(output)
         os.chmod(output, st.st_mode | stat.S_IEXEC)
 
+
 def main() -> None:
     parser = argparse.ArgumentParser()
     parser.add_argument("tool", help="Tool name")
@@ -128,12 +130,17 @@ def main() -> None:
         try:
             import certifi
             import ssl
-        except:
-            print("\"certifi\" module not found. Please install it using \"python -m pip install certifi\".")
+        except ImportError:
+            print(
+                '"certifi" module not found. Please install it using "python -m pip install certifi".'
+            )
             return
-            
-        with urllib.request.urlopen(req, context=ssl.create_default_context(cafile=certifi.where())) as response:
+
+        with urllib.request.urlopen(
+            req, context=ssl.create_default_context(cafile=certifi.where())
+        ) as response:
             download(url, response, output)
 
+
 if __name__ == "__main__":
     main()
diff --git a/tools/project.py b/tools/project.py
index c6207c988..e3f7a393f 100644
--- a/tools/project.py
+++ b/tools/project.py
@@ -767,11 +767,11 @@ def generate_build_ninja(
         n.newline()
 
     def write_custom_step(step: str, prev_step: Optional[str] = None) -> None:
-        implicit: List[str | Path] = []
+        implicit: List[Union[str, Path]] = []
         if config.custom_build_steps and step in config.custom_build_steps:
             n.comment(f"Custom build steps ({step})")
             for custom_step in config.custom_build_steps[step]:
-                outputs = cast(List[str | Path], custom_step.get("outputs"))
+                outputs = cast(List[Union[str, Path]], custom_step.get("outputs"))
 
                 if isinstance(outputs, list):
                     implicit.extend(outputs)
@@ -1589,7 +1589,7 @@ def generate_objdiff_config(
                         "build_ctx": True,
                     }
                 )
-        category_opt: List[str] | str = obj.options["progress_category"]
+        category_opt: Union[List[str], str] = obj.options["progress_category"]
         if isinstance(category_opt, list):
             progress_categories.extend(category_opt)
         elif category_opt is not None: