Hi, I cannot update or re-install texlive: $ LANG=C guix install texlive The following package will be upgraded: texlive (dependencies or package changed) The following derivation will be built: /gnu/store/a9ndmp1c8bqaz9s7h6x3k7f4l7qawq7n-texlive-texmf-20190410.drv 2845.8 MB will be downloaded downloading from https://ci.guix.gnu.org/nar/lzip/z4xvgiliw5baf1pr4z03c7n2hw3bm5x5-texlive-texmf-20190410 ... texlive-texmf-20190410 2.61GiB 3.3MiB/s 00:02 [ ] 0.2%guix substitute: error: TLS error in procedure 'read_from_session_record_port': Error decoding the received TLS packet. substitution of /gnu/store/z4xvgiliw5baf1pr4z03c7n2hw3bm5x5-texlive-texmf-20190410 failed guix install: error: some substitutes for the outputs of derivation `/gnu/store/v5arvb6lqg86gc2lsnmyfi1bj74yzx7f-texlive-20190410.drv' failed (usually happens due to networking issues); try `--fallback' to build derivation from source Best wishes, Arne -- Unpolitisch sein heißt politisch sein ohne es zu merken