waf: Fix Python 3.12 escape sequences

Updates #4968

1 files changed, 1 insertions, 1 deletions

diff --git a/wscript b/wscript
index 69732d4e17..dd7fda7225 100755
--- a/wscript
+++ b/wscript
@@ -125,7 +125,7 @@ class Template(string.Template):
     idpattern = "[_A-Za-z][_A-Za-z0-9:#]*"
 
 
-_VAR_PATTERN = re.compile("\$\{?(" + Template.idpattern + ")\}?$")
+_VAR_PATTERN = re.compile("\\$\\{?(" + Template.idpattern + ")\\}?$")
 
 
 def _is_enabled_op_and(enabled, enabled_by):