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     StateVar-1.1.1.1
Starting     Diff-0.3.4
Starting     base-orphans-0.8
Starting     SHA-1.6.4.4
Building     base-orphans-0.8
Building     Diff-0.3.4
Building     StateVar-1.1.1.1
Building     SHA-1.6.4.4
Completed    base-orphans-0.8
Starting     bzlib-0.5.0.5
Completed    StateVar-1.1.1.1
Starting     cabal-doctest-1.0.6
Failed to install bzlib-0.5.0.5
Build log ( /home/builder/.cabal/logs/ghc-8.6.3/bzlib-0.5.0.5-8TMEZNLRAIMKxXCedq0SW1.log ):
cabal: Entering directory '/tmp/cabal-tmp-1958/bzlib-0.5.0.5'
Configuring bzlib-0.5.0.5...
cabal: Missing dependency on a foreign library:
* Missing (or bad) header file: bzlib.h
* Missing (or bad) C library: bz2
This problem can usually be solved by installing the system package that
provides this library (you may need the "-dev" version). If the library is
already installed but in a non-standard location then you can use the flags
--extra-include-dirs= and --extra-lib-dirs= to specify where it is.If the
library file does exist, it may contain errors that are caught by the C
compiler at the preprocessing stage. In this case you can re-run configure
with the verbosity flag -v3 to see the error messages.
If the header file does exist, it may contain errors that are caught by the C
compiler at the preprocessing stage. In this case you can re-run configure
with the verbosity flag -v3 to see the error messages.

cabal: Leaving directory '/tmp/cabal-tmp-1958/bzlib-0.5.0.5'
Starting     call-stack-0.1.0
Building     cabal-doctest-1.0.6
Completed    Diff-0.3.4
Building     call-stack-0.1.0
Completed    call-stack-0.1.0
Completed    cabal-doctest-1.0.6
Completed    SHA-1.6.4.4
cabal: Error: some packages failed to install:
bzlib-0.5.0.5-8TMEZNLRAIMKxXCedq0SW1 failed during the configure step. The
exception was:
ExitFailure 1
cabal-debian-4.38.5-HuNLSN7U12pCzgsPLw7jQv depends on cabal-debian-4.38.5
which failed to install.
debian-3.95-KRLPXPqVvlMCfAPPJ75qi1 depends on debian-3.95 which failed to
install.