Warning: The install command is a part of the legacy v1 style of cabal usage.

Please switch to using either the new project style and the new-install
command or the legacy v1-install alias as new-style projects will become the
default in the next version of cabal-install. Please file a bug if you cannot
replicate a working v1- use case with the new-style commands.

For more information, see: https://wiki.haskell.org/Cabal/NewBuild

Resolving dependencies...
Starting     auto-update-0.1.4
Starting     appar-0.1.7
Starting     StateVar-1.1.1.1
Starting     base-compat-0.10.5
Building     auto-update-0.1.4
Building     appar-0.1.7
Building     StateVar-1.1.1.1
Building     base-compat-0.10.5
Completed    appar-0.1.7
Starting     base-orphans-0.8
Completed    StateVar-1.1.1.1
Starting     base64-bytestring-1.0.0.2
Completed    auto-update-0.1.4
Starting     basement-0.0.8
Building     base-orphans-0.8
Building     base64-bytestring-1.0.0.2
Building     basement-0.0.8
Completed    base-orphans-0.8
Starting     blaze-builder-0.4.1.0
Building     blaze-builder-0.4.1.0
Completed    base64-bytestring-1.0.0.2
Starting     byteable-0.1.1
Building     byteable-0.1.1
Completed    base-compat-0.10.5
Starting     byteorder-1.0.4
Completed    byteable-0.1.1
Starting     cabal-doctest-1.0.6
Building     byteorder-1.0.4
Building     cabal-doctest-1.0.6
Completed    blaze-builder-0.4.1.0
Starting     call-stack-0.1.0
Completed    byteorder-1.0.4
Starting     cereal-0.5.7.0
Building     call-stack-0.1.0
Building     cereal-0.5.7.0
Completed    call-stack-0.1.0
Starting     clock-0.7.2
Completed    cabal-doctest-1.0.6
Starting     colour-2.3.4
Building     clock-0.7.2
Building     colour-2.3.4
Completed    clock-0.7.2
Starting     cryptohash-md5-0.11.100.1
Building     cryptohash-md5-0.11.100.1
Completed    cryptohash-md5-0.11.100.1
Starting     cryptohash-sha1-0.11.100.1
Building     cryptohash-sha1-0.11.100.1
Completed    cereal-0.5.7.0
Downloading  data-binary-ieee754-0.4.4
Downloaded   data-binary-ieee754-0.4.4
Starting     data-binary-ieee754-0.4.4
Building     data-binary-ieee754-0.4.4
Completed    colour-2.3.4
Starting     data-default-class-0.1.2.0
Completed    cryptohash-sha1-0.11.100.1
Starting     dlist-0.8.0.5
Building     data-default-class-0.1.2.0
Completed    data-binary-ieee754-0.4.4
Downloading  dotnet-timespan-0.0.1.0
Downloaded   dotnet-timespan-0.0.1.0
Starting     dotnet-timespan-0.0.1.0
Building     dlist-0.8.0.5
Building     dotnet-timespan-0.0.1.0
Completed    data-default-class-0.1.2.0
Starting     easy-file-0.2.2
Building     easy-file-0.2.2
Completed    dotnet-timespan-0.0.1.0
Starting     entropy-0.4.1.4
Completed    dlist-0.8.0.5
Starting     erf-2.0.0.0
Building     erf-2.0.0.0
Completed    easy-file-0.2.2
Starting     hashable-1.2.7.0
Building     entropy-0.4.1.4
Building     hashable-1.2.7.0
Completed    erf-2.0.0.0
Starting     haskell-src-exts-1.20.3
Failed to install haskell-src-exts-1.20.3
Build log ( /home/builder/.cabal/logs/ghc-8.6.3/haskell-src-exts-1.20.3-2fryh11Yuz7lCtLeeIQn8.log ):
cabal: Entering directory '/tmp/cabal-tmp-10931/haskell-src-exts-1.20.3'
Configuring haskell-src-exts-1.20.3...
cabal: The program 'happy' version >=1.19 is required but it could not be
found.

cabal: Leaving directory '/tmp/cabal-tmp-10931/haskell-src-exts-1.20.3'
Starting     hourglass-0.2.12
Building     hourglass-0.2.12
Completed    entropy-0.4.1.4
Completed    hashable-1.2.7.0
Completed    hourglass-0.2.12
Completed    basement-0.0.8
cabal: Error: some packages failed to install:
eventsource-geteventstore-store-1.2.1-KEBt5PWGjy8ExyMwTOP1Jo depends on
eventsource-geteventstore-store-1.2.1 which failed to install.
eventstore-1.2.0-K5FxHhJ5X1OGU2ynmZyKhv depends on eventstore-1.2.0 which
failed to install.
haskell-src-exts-1.20.3-2fryh11Yuz7lCtLeeIQn8 failed during the configure
step. The exception was:
ExitFailure 1
haskell-src-meta-0.8.0.3-JbAhgnac8Prmw8CgUyXzF depends on
haskell-src-meta-0.8.0.3 which failed to install.
interpolate-0.2.0-LZ9XVsUMBdv7ivR049HbSt depends on interpolate-0.2.0 which
failed to install.