--- seamonkey-2.53.9/security/sandbox/linux/moz.build	2021-08-08 15:02:00.000000000 +0200
+++ seamonkey-2.53.9.new/security/sandbox/linux/moz.build	2021-08-26 14:43:43.392464338 +0200
@@ -99,7 +99,7 @@
 # forcing there to be only one partition.
 for f in CONFIG['OS_CXXFLAGS']:
     if f.startswith('-flto') and CONFIG['CC_TYPE'] != 'clang':
-        LDFLAGS += ['--param lto-partitions=1']
+        LDFLAGS += ['--param=lto-partitions=1']
 
 # -if CONFIG['MOZ_ALSA']:
 # -    DEFINES['MOZ_ALSA'] = True