Resolving dependencies...
Starting     integer-logarithms-1.0.3
Starting     primitive-0.7.1.0
Starting     hashable-1.3.0.0
Building     integer-logarithms-1.0.3
Building     hashable-1.3.0.0
Building     primitive-0.7.1.0
Completed    integer-logarithms-1.0.3
Completed    hashable-1.3.0.0
Completed    primitive-0.7.1.0
Starting     scientific-0.3.6.2
Building     scientific-0.3.6.2
Completed    scientific-0.3.6.2
Starting     attoparsec-0.13.2.4
Building     attoparsec-0.13.2.4
Completed    attoparsec-0.13.2.4
Starting     elynx-nexus-0.3.1
Building     elynx-nexus-0.3.1
Failed to install elynx-nexus-0.3.1
Build log ( /home/builder/.cabal/logs/ghc-8.6.3/elynx-nexus-0.3.1-9Ft3ZVeuCTZD1EZbI9uHrt.log ):
cabal: Entering directory '/tmp/cabal-tmp-5630/elynx-nexus-0.3.1'
Configuring elynx-nexus-0.3.1...
Preprocessing library for elynx-nexus-0.3.1..
Building library for elynx-nexus-0.3.1..

<no location info>: error:
    Warning: Couldn't figure out LLVM version!
             Make sure you have installed LLVM 6.0
[1 of 3] Compiling ELynx.Export.Nexus ( src/ELynx/Export/Nexus.hs, dist/build/ELynx/Export/Nexus.o )

<no location info>: error:
    Warning: Couldn't figure out LLVM version!
             Make sure you have installed LLVM 6.0
ghc: could not execute: opt
cabal: Leaving directory '/tmp/cabal-tmp-5630/elynx-nexus-0.3.1'
cabal: Error: some packages failed to install:
elynx-nexus-0.3.1-9Ft3ZVeuCTZD1EZbI9uHrt failed during the building phase. The
exception was:
ExitFailure 1