--- ccache-3.1/ccache.c~	2010-09-16 19:01:09.000000000 +0200
+++ ccache-3.1/ccache.c	2010-10-02 18:16:57.670019849 +0200
@@ -814,8 +814,10 @@
 		/* Do nothing. */
 	} else if (str_eq(compilercheck, "mtime")) {
 		hash_delimiter(hash, "cc_mtime");
-		hash_int(hash, st->st_size);
-		hash_int(hash, st->st_mtime);
+		if (!getenv("CCACHE_NOHASH_SIZE_MTIME")) {
+			hash_int(hash, st->st_size);
+			hash_int(hash, st->st_mtime);
+		}
 	} else if (str_eq(compilercheck, "content") || !allow_command) {
 		hash_delimiter(hash, "cc_content");
 		hash_file(hash, path);