diff --git a/pyporter/utils.py b/pyporter/utils.py
index 932e2974b19636da23512049097b5b3b06a482fb..03694309b9931fcf73e88722eac69e6d66281f48 100644
--- a/pyporter/utils.py
+++ b/pyporter/utils.py
@@ -1,32 +1,35 @@
 import re
 
 
-# TODO: this should be more compatible for https://peps.python.org/pep-0508/
-def transform_module_name(input_str):
-    match = re.match(r"([a-zA-Z0-9_-]+)", input_str)
-    if match:
-        module_name = match.group(1).strip()
-
-        version_names = input_str[len(module_name):].strip().strip("()")
-        version_constraint = version_names.split(",")
-        package_name = "python3-" + module_name
-        if len(version_constraint) > 1:
-            constraints_string = " with ".join([
-                f"{package_name}{constraint}" for constraint in version_constraint
-            ])
-            result_string = f"({constraints_string})"
-        else:
-            result_string = f"({package_name}{version_constraint[0]})"
-    else:
-        result_string = "Invalid input format"
-
-    return result_string
-
-
-def refine_requires(req: str) -> str:
-    """
-    return only requires without ';' (thus no extra)
-    """
-    ra = req.split(";", 1)
-    # Do not add requires which has ;, which is often has very complicated precondition
-    return transform_module_name(ra[0])
+# TODO: this should be more compatible for https://peps.python.org/pep-0508/ 
+def transform_module_name(input_str):  
+    # Use a more comprehensive regex to match module names and version constraints  
+    match = re.match(r"^([a-zA-Z0-9_-]+)(?:\[([^\[\]]+)\])?$", input_str)  
+    if match:  
+        module_name = match.group(1).strip()  
+        version_constraint = match.group(2)  
+          
+        package_name = "python3-" + module_name  
+        if version_constraint:  
+            # Clean up and format the version constraint  
+            version_constraint = version_constraint.strip().replace(' ', '')  
+            if ',' in version_constraint:  
+                constraints = [f"{package_name}{vc.strip()}" for vc in version_constraint.split(',')]  
+                result_string = f"({' with '.join(constraints)})"  
+            else:  
+                result_string = f"({package_name}{version_constraint})"  
+        else:  
+            result_string = f"({package_name})"  
+    else:  
+        result_string = "Invalid input format"  
+  
+    return result_string  
+  
+def refine_requires(req: str) -> str:  
+    """  
+    Return only the requires part without ';' (thus no extra metadata)  
+    """  
+    # Split the requirement string at the first ';' to remove any extra metadata  
+    requires_part = req.split(";", 1)[0].strip()  
+    # Transform the requires part using the transform_module_name function  
+    return transform_module_name(requires_part)