Index: mesa-24.1.0/src/nouveau/headers/class_parser.py
===================================================================
--- mesa-24.1.0.orig/src/nouveau/headers/class_parser.py
+++ mesa-24.1.0/src/nouveau/headers/class_parser.py
@@ -9,6 +9,16 @@ import sys
 
 from mako.template import Template
 
+def removeprefix(s, prefix):
+    if s.startswith(prefix):
+        return s[len(prefix):]
+    return s
+
+def removesuffix(s, suffix):
+    if s.endswith(suffix):
+        return s[:-len(suffix)]
+    return s
+
 METHOD_ARRAY_SIZES = {
     'BIND_GROUP_CONSTANT_BUFFER'                        : 16,
     'CALL_MME_DATA'                                     : 256,
@@ -293,7 +303,7 @@ def parse_header(nvcl, f):
                 if ":" in list[2]:
                     state = 1
                 elif teststr in list[1]:
-                    curmthd.field_defs[curfield][list[1].removeprefix(teststr)] = list[2]
+                    curmthd.field_defs[curfield][removeprefix(list[1], teststr)] = list[2]
                 else:
                     state = 1
 
@@ -303,7 +313,7 @@ def parse_header(nvcl, f):
                     if ("0x" in list[2]):
                         state = 1
                     else:
-                        field = list[1].removeprefix(teststr)
+                        field = removeprefix(list[1], teststr)
                         bitfield = list[2].split(":")
                         curmthd.field_name_start[field] = bitfield[1]
                         curmthd.field_name_end[field] = bitfield[0]
@@ -324,13 +334,13 @@ def parse_header(nvcl, f):
                 is_array = 0
                 if (':' in list[2]):
                     continue
-                name = list[1].removeprefix(teststr)
+                name = removeprefix(list[1], teststr)
                 if name.endswith("(i)"):
                     is_array = 1
-                    name = name.removesuffix("(i)")
+                    name = removesuffix(name, "(i)")
                 if name.endswith("(j)"):
                     is_array = 1
-                    name = name.removesuffix("(j)")
+                    name = removesuffix(name, "(j)")
                 x = method()
                 x.name = name
                 x.addr = list[2]
@@ -357,8 +367,8 @@ def main():
 
     clheader = os.path.basename(args.in_h)
     nvcl = clheader
-    nvcl = nvcl.removeprefix("cl")
-    nvcl = nvcl.removesuffix(".h")
+    nvcl = removeprefix(nvcl, "cl")
+    nvcl = removesuffix(nvcl, ".h")
     nvcl = nvcl.upper()
     nvcl = "NV" + nvcl