:1:~/racket/bin $ ./raco pkg install simple-http                                                                                        1s  - [19-05-17 10:42]
Resolving "simple-http" via https://download.racket-lang.org/releases/7.3/catalog/
ssl-connect: connect failed (error:1416F086:SSL routines:tls_process_server_certificate:certificate verify failed)
  context...:
   /home/rgrau/racket/collects/openssl/mzssl.rkt:1472:8: loop
   /home/rgrau/racket/collects/openssl/../racket/private/more-scheme.rkt:261:28
   /home/rgrau/racket/collects/net/http-client.rkt:67:0: http-conn-open!10
   /home/rgrau/racket/collects/net/http-client.rkt:272:0
   /home/rgrau/racket/collects/racket/contract/private/arrow-val-first.rkt:430:3
   /home/rgrau/racket/collects/net/url.rkt:195:0: http://getpost-impure-port
   /home/rgrau/racket/collects/net/url.rkt:302:2: redirection-loop
   /home/rgrau/racket/collects/racket/contract/private/arrow-val-first.rkt:430:3
   /home/rgrau/racket/collects/pkg/private/network.rkt:59:3
   /home/rgrau/racket/collects/pkg/private/catalog.rkt:218:0: read-from-server
   /home/rgrau/racket/collects/pkg/private/catalog.rkt:138:9: for-loop
   /home/rgrau/racket/collects/pkg/private/catalog.rkt:135:2: lookup-normally
   /home/rgrau/racket/collects/pkg/private/../../racket/private/more-scheme.rkt:261:28
   /home/rgrau/racket/collects/pkg/private/prefetch.rkt:128:2
   /home/rgrau/racket/collects/pkg/private/catalog.rkt:132:0: package-catalog-lookup9
   /home/rgrau/racket/collects/pkg/private/catalog.rkt:200:0: package-catalog-lookup-source19
   ...