diff --git a/build_tools/pexpect_helper.py b/build_tools/pexpect_helper.py
index 81131043e..347c699f5 100644
--- a/build_tools/pexpect_helper.py
+++ b/build_tools/pexpect_helper.py
@@ -48,21 +48,7 @@ SANITIZE_FOR_PRINTING_RE = re.compile(
 
 def get_prompt_re(counter):
     """Return a regular expression for matching a with a given prompt counter."""
-    return re.compile(
-        r"""(?:\r\n?|^)   # beginning of line
-            (?:\x1b[\d[KB(m]*)* # optional colors
-            (?:\x1b[\?2004h) # Bracketed paste
-            (?:\x1b[>4;1m) # XTerm's modifyOtherKeys
-            (?:\x1b[>5u) # CSI u with kitty progressive enhancement
-            (?:\x1b=) # set application keypad mode, so the keypad keys send unique codes
-            (?:\[.\]\ )?  # optional vi mode prompt
-         """
-        + (r"prompt\ %d>" % counter)  # prompt with counter
-        + r"""
-            (?:\x1b[\d\[KB(m]*)* # optional colors
-        """,
-        re.VERBOSE,
-    )
+    return re.compile("prompt %d>" % counter)
 
 
 def get_callsite():