diff -pruN fonts-rpm-macros-2.0.5.orig/bin/gen-fontconf fonts-rpm-macros-2.0.5/bin/gen-fontconf
--- fonts-rpm-macros-2.0.5.orig/bin/gen-fontconf	2020-04-03 07:55:50.000000000 +0900
+++ fonts-rpm-macros-2.0.5/bin/gen-fontconf	2024-06-03 14:07:58.244902559 +0900
@@ -23,7 +23,11 @@ from lxml import etree
 from operator import itemgetter
 import os
 from pathlib import PurePath
-import ruamel.yaml
+yaml_supported = True
+try:
+    import ruamel.yaml
+except ModuleNotFoundError:
+    yaml_supported = False
 import subprocess
 import sys
 
@@ -36,14 +40,17 @@ oneormore = ['fullname', 'family', 'styl
 parser = argparse.ArgumentParser(
            description='Generate traditional fontconfig syntax from a high-level configuration file')
 cgroup = parser.add_mutually_exclusive_group(required=True)
-cgroup.add_argument("-y", "--yaml", "-c", "--config", type=str,
-                    help="YAML configuration file to process")
+mode = ['xml', 'legacy']
+if yaml_supported:
+    mode.append('yaml')
+    cgroup.add_argument("-y", "--yaml", "-c", "--config", type=str,
+                        help="YAML configuration file to process")
 cgroup.add_argument("-x", "--xml", type=str,
                     help="XML configuration file to process")
 parser.add_argument("-l", "--license", metavar="SPDX ID", type=str, nargs='?', default="MIT",
                      help="SPDX license identifier for the generated files")
 parser.add_argument("-m", "--mode", metavar="MODE", type=str, nargs='?',
-                     default="legacy",  choices=['xml', 'yaml', 'legacy'],
+                     default="legacy",  choices=mode,
                      help="Output format: current fontconfig syntax, or XML/YAML syntax proposals")
 parser.add_argument("-w", "--write", action="store_true",
                      help="Write output to disk")
@@ -685,7 +692,7 @@ ext = '.conf'
 if args.mode == 'xml':
   ext = '.xml'
 
-if args.yaml != None:
+if yaml_supported and args.yaml != None:
   groups = readyaml(args.yaml)
   if args.write and output == None:
     output = PurePath(PurePath(args.yaml).name).with_suffix(ext)