diff --git a/metagpt/utils/dependency_file.py b/metagpt/utils/dependency_file.py
index 9ecead244..65ccd118d 100644
--- a/metagpt/utils/dependency_file.py
+++ b/metagpt/utils/dependency_file.py
@@ -93,11 +93,10 @@ class DependencyFile:
 
         root = self._filename.parent
         try:
-            key = Path(filename).relative_to(root)
+            key = Path(filename).relative_to(root).as_posix()
         except ValueError:
             key = filename
-        key = re.sub(r"\\+", "/", str(key))
-        return set(self._dependencies.get(key, {}))
+        return set(self._dependencies.get(str(key), {}))
 
     def delete_file(self):
         """Delete the dependency file."""
diff --git a/tests/metagpt/test_incremental_dev.py b/tests/metagpt/test_incremental_dev.py
index 92001a5d1..c47397dd7 100644
--- a/tests/metagpt/test_incremental_dev.py
+++ b/tests/metagpt/test_incremental_dev.py
@@ -6,6 +6,7 @@
 @File    : test_incremental_dev.py
 """
 import os
+import shutil
 import subprocess
 import time
 
@@ -116,13 +117,14 @@ def get_incremental_dev_result(idea, project_name, use_review=True):
     if not project_path.exists():
         # If the project does not exist, extract the project file
         try:
-            if os.name == "nt":
-                subprocess.run(["tar", "-xf", f"{project_path}.zip", "-C", str(project_path.parent)], check=True)
-            else:
+            if shutil.which("unzip"):
                 subprocess.run(["unzip", f"{project_path}.zip", "-d", str(project_path.parent)], check=True)
+            elif shutil.which("tar"):
+                subprocess.run(["tar", "-xf", f"{project_path}.zip", "-C", str(project_path.parent)], check=True)
             logger.info(f"Extracted project {project_name} successfully.")
+        except FileNotFoundError as e:
+            raise FileNotFoundError(f"Neither 'unzip' nor 'tar' command found. Error: {e}")
         except subprocess.CalledProcessError as e:
-            # If the extraction fails, throw an exception
             raise Exception(f"Failed to extract project {project_name}. Error: {e}")
 
     check_or_create_base_tag(project_path)