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     regex-applicative-0.3.3.1
Starting     util-0.1.14.1
Starting     Cabal-3.0.0.0
Building     util-0.1.14.1
Building     regex-applicative-0.3.3.1
Building     Cabal-3.0.0.0
Completed    util-0.1.14.1
Completed    regex-applicative-0.3.3.1
Completed    Cabal-3.0.0.0
Starting     ucd-0.0.1.2
Building     ucd-0.0.1.2
Failed to install ucd-0.0.1.2
Build log ( /home/builder/.cabal/logs/ghc-8.6.3/ucd-0.0.1.2-Ec4circtrgQB2OyeibazfK.log ):
cabal: Entering directory '/tmp/cabal-tmp-15415/ucd-0.0.1.2'
[1 of 1] Compiling Main             ( /tmp/cabal-tmp-15415/ucd-0.0.1.2/dist/setup/setup.hs, /tmp/cabal-tmp-15415/ucd-0.0.1.2/dist/setup/Main.o )
Linking /tmp/cabal-tmp-15415/ucd-0.0.1.2/dist/setup/setup ...
Configuring ucd-0.0.1.2...
Preprocessing library for ucd-0.0.1.2..
setup: can't find source for Data/Char/Properties/DerivedCore in src,
dist/build/autogen, dist/build/global-autogen

cabal: Leaving directory '/tmp/cabal-tmp-15415/ucd-0.0.1.2'
cabal: Error: some packages failed to install:
ucd-0.0.1.2-Ec4circtrgQB2OyeibazfK failed during the building phase. The
exception was:
ExitFailure 1