(name . bug-guix)(address . bug-guix@gnu.org)
It seems that the static library archive 'liby.a' contains build time timestamps:
Toggle snippet (12 lines)
diffoscope --exclude-command bin/stat /gnu/store/aqcpvkx93zbf1zr46qi5h1yf6a1cj9i1-bison-3.3.2{,-check}
--- /gnu/store/aqcpvkx93zbf1zr46qi5h1yf6a1cj9i1-bison-3.3.2
+++ /gnu/store/aqcpvkx93zbf1zr46qi5h1yf6a1cj9i1-bison-3.3.2-check
??? lib
? ??? liby.a
? ? ??? file list
? ? ? @@ -1,3 +1,3 @@
? ? ? ----------- 0 0 0 26 2019-05-04 18:09:58.000000 /
? ? ? +---------- 0 0 0 26 2019-05-04 18:09:39.000000 /
? ? ? ?rw-r--r-- 0 0 0 2648 1970-01-01 00:00:00.000000 main.o
? ? ? ?rw-r--r-- 0 0 0 4404 1970-01-01 00:00:00.000000 yyerror.o