The build is unreachable.

Build log

> /tmp/stackage-build2456$ stack unpack network-2.8.0.0@sha256:aae171e6c6028a7791dbe4de5b9d2da398056359e3cc7927465ffa3cdae1aa0b
Unpacked network-2.8.0.0 to /tmp/stackage-build2456/network-2.8.0.0/
> /tmp/stackage-build2456/network-2.8.0.0$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
[1 of 1] Compiling Main             ( Setup.hs, Setup.o )
Linking Setup ...
> /tmp/stackage-build2456/network-2.8.0.0$ ./Setup configure --package-db=clear --package-db=global --package-db=/home/circleci/project/builds/nightly/pkgdb --libdir=/home/circleci/project/builds/nightly/lib --bindir=/home/circleci/project/builds/nightly/bin --datadir=/home/circleci/project/builds/nightly/share --libexecdir=/home/circleci/project/builds/nightly/libexec --sysconfdir=/home/circleci/project/builds/nightly/etc --docdir=/home/circleci/project/builds/nightly/doc/network-2.8.0.0 --htmldir=/home/circleci/project/builds/nightly/doc/network-2.8.0.0 --haddockdir=/home/circleci/project/builds/nightly/doc/network-2.8.0.0
Configuring network-2.8.0.0...
configure: WARNING: unrecognized options: --with-compiler
checking build system type... x86_64-pc-linux-gnu
checking host system type... x86_64-pc-linux-gnu
checking for gcc... /usr/bin/gcc
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking for suffix of executables... 
checking whether we are cross compiling... no
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether /usr/bin/gcc accepts -g... yes
checking for /usr/bin/gcc option to accept ISO C89... none needed
checking for an ANSI C-conforming const... yes
checking how to run the C preprocessor... /usr/bin/gcc -E
checking for grep that handles long lines and -e... /bin/grep
checking for egrep... /bin/grep -E
checking for ANSI C header files... yes
checking for sys/types.h... yes
checking for sys/stat.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for memory.h... yes
checking for strings.h... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for unistd.h... yes
checking fcntl.h usability... yes
checking fcntl.h presence... yes
checking for fcntl.h... yes
checking limits.h usability... yes
checking limits.h presence... yes
checking for limits.h... yes
checking for stdlib.h... (cached) yes
checking for sys/types.h... (cached) yes
checking for unistd.h... (cached) yes
checking winsock2.h usability... no
checking winsock2.h presence... no
checking for winsock2.h... no
checking ws2tcpip.h usability... no
checking ws2tcpip.h presence... no
checking for ws2tcpip.h... no
checking arpa/inet.h usability... yes
checking arpa/inet.h presence... yes
checking for arpa/inet.h... yes
checking netdb.h usability... yes
checking netdb.h presence... yes
checking for netdb.h... yes
checking netinet/in.h usability... yes
checking netinet/in.h presence... yes
checking for netinet/in.h... yes
checking netinet/tcp.h usability... yes
checking netinet/tcp.h presence... yes
checking for netinet/tcp.h... yes
checking sys/socket.h usability... yes
checking sys/socket.h presence... yes
checking for sys/socket.h... yes
checking sys/uio.h usability... yes
checking sys/uio.h presence... yes
checking for sys/uio.h... yes
checking sys/un.h usability... yes
checking sys/un.h presence... yes
checking for sys/un.h... yes
checking linux/can.h usability... yes
checking linux/can.h presence... yes
checking for linux/can.h... yes
checking linux/tcp.h usability... yes
checking linux/tcp.h presence... yes
checking for linux/tcp.h... yes
checking net/if.h usability... yes
checking net/if.h presence... yes
checking for net/if.h... yes
checking for readlink... yes
checking for symlink... yes
checking for if_nametoindex... yes
checking for struct msghdr.msg_control... yes
checking for struct msghdr.msg_accrights... no
checking for struct sockaddr.sa_len... no
checking for in_addr_t in netinet/in.h... yes
checking for SO_PEERCRED and struct ucred in sys/socket.h... yes
checking for getpeereid in unistd.h... checking for getpeereid... no
checking for _head_libws2_32_a in -lws2_32... no
checking for getaddrinfo... yes
checking for gai_strerror... yes
checking whether AI_ADDRCONFIG is declared... yes
checking whether AI_ALL is declared... yes
checking whether AI_NUMERICSERV is declared... yes
checking whether AI_V4MAPPED is declared... yes
checking whether IPV6_V6ONLY is declared... yes
checking whether IPPROTO_IP is declared... yes
checking whether IPPROTO_TCP is declared... yes
checking whether IPPROTO_IPV6 is declared... yes
checking for sendfile in sys/sendfile.h... yes
checking for sendfile in sys/socket.h... no
checking for gethostent... yes
checking for accept4... yes
configure: creating ./config.status
config.status: creating network.buildinfo
config.status: creating include/HsNetworkConfig.h
configure: WARNING: unrecognized options: --with-compiler
> /tmp/stackage-build2456/network-2.8.0.0$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2456/network-2.8.0.0$ ./Setup build
Preprocessing library for network-2.8.0.0..
Building library for network-2.8.0.0..
[ 1 of 11] Compiling Network.Socket.ByteString.IOVec ( dist/build/Network/Socket/ByteString/IOVec.hs, dist/build/Network/Socket/ByteString/IOVec.o )
[ 2 of 11] Compiling Network.Socket.Types ( dist/build/Network/Socket/Types.hs, dist/build/Network/Socket/Types.o )
[ 3 of 11] Compiling Network.Socket.Internal ( dist/build/Network/Socket/Internal.hs, dist/build/Network/Socket/Internal.o )
[ 4 of 11] Compiling Network.Socket   ( dist/build/Network/Socket.hs, dist/build/Network/Socket.o )

Network/Socket.hsc:267:1: warning: [-Wunused-imports]
    The qualified import of ‘Control.Exception’ is redundant
      except perhaps to import instances from ‘Control.Exception’
    To import instances alone, use: import Control.Exception()
    |
267 | import qualified Control.Exception as E
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Network/Socket.hsc:633:8: warning: [-Wunused-matches]
    Defined but not used: ‘sock’
    |
633 | accept sock@(MkSocket s family stype protocol status) = do
    |        ^^^^
[ 5 of 11] Compiling Network.Socket.ByteString.MsgHdr ( dist/build/Network/Socket/ByteString/MsgHdr.hs, dist/build/Network/Socket/ByteString/MsgHdr.o )
[ 6 of 11] Compiling Network.Socket.ByteString.Internal ( Network/Socket/ByteString/Internal.hs, dist/build/Network/Socket/ByteString/Internal.o )
[ 7 of 11] Compiling Network.Socket.ByteString.Lazy.Posix ( Network/Socket/ByteString/Lazy/Posix.hs, dist/build/Network/Socket/ByteString/Lazy/Posix.o )
[ 8 of 11] Compiling Network.Socket.ByteString ( dist/build/Network/Socket/ByteString.hs, dist/build/Network/Socket/ByteString.o )
[ 9 of 11] Compiling Network.Socket.ByteString.Lazy ( Network/Socket/ByteString/Lazy.hs, dist/build/Network/Socket/ByteString/Lazy.o )
[10 of 11] Compiling Network.BSD      ( dist/build/Network/BSD.hs, dist/build/Network/BSD.o )
[11 of 11] Compiling Network          ( Network.hs, dist/build/Network.o )
> /tmp/stackage-build2456/network-2.8.0.0$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2456/network-2.8.0.0$ ./Setup copy
Installing library in /home/circleci/project/builds/nightly/lib/x86_64-linux-ghc-8.7.20181117/network-2.8.0.0-AkCJm1aNSYz7ekXKYyI0pF
> /tmp/stackage-build2456/network-2.8.0.0$ ghc -clear-package-db -global-package-db -package-db=/home/circleci/project/builds/nightly/pkgdb Setup
> /tmp/stackage-build2456/network-2.8.0.0$ ./Setup register
Registering library for network-2.8.0.0..