Resolving dependencies...
Starting     old-locale-1.0.0.7
Starting     hashable-1.3.0.0
Starting     unliftio-core-0.2.0.1
Starting     network-3.1.0.1
Building     old-locale-1.0.0.7
Building     unliftio-core-0.2.0.1
Building     hashable-1.3.0.0
Completed    unliftio-core-0.2.0.1
Completed    old-locale-1.0.0.7
Starting     old-time-1.1.0.3
Building     network-3.1.0.1
Building     old-time-1.1.0.3
Completed    hashable-1.3.0.0
Starting     async-2.2.2
Starting     unordered-containers-0.2.12.0
Building     unordered-containers-0.2.12.0
Building     async-2.2.2
Completed    async-2.2.2
Starting     unliftio-0.2.13
Completed    old-time-1.1.0.3
Starting     unix-time-0.4.7
Building     unliftio-0.2.13
Building     unix-time-0.4.7
Completed    network-3.1.0.1
Starting     network-bsd-2.8.1.0
Completed    unix-time-0.4.7
Building     network-bsd-2.8.1.0
Completed    network-bsd-2.8.1.0
Starting     hslogger-1.3.1.0
Completed    unordered-containers-0.2.12.0
Building     hslogger-1.3.1.0
Completed    unliftio-0.2.13
Completed    hslogger-1.3.1.0
Downloading  metro-0.1.0.0
Downloaded   metro-0.1.0.0
Starting     metro-0.1.0.0
Building     metro-0.1.0.0
Failed to install metro-0.1.0.0
Build log ( /home/builder/.cabal/logs/ghc-8.6.3/metro-0.1.0.0-4oJPonuyuOP6I9Jf9vrX74.log ):
cabal: Entering directory '/tmp/cabal-tmp-8844/metro-0.1.0.0'
Configuring metro-0.1.0.0...
Preprocessing library for metro-0.1.0.0..
Building library for metro-0.1.0.0..
[ 1 of 12] Compiling Metro.Class      ( src/Metro/Class.hs, dist/build/Metro/Class.o )
[ 2 of 12] Compiling Metro.IOHashMap  ( src/Metro/IOHashMap.hs, dist/build/Metro/IOHashMap.o )
[ 3 of 12] Compiling Metro.Lock       ( src/Metro/Lock.hs, dist/build/Metro/Lock.o )
[ 4 of 12] Compiling Metro.TP.BS      ( src/Metro/TP/BS.hs, dist/build/Metro/TP/BS.o )
[ 5 of 12] Compiling Metro.TP.Debug   ( src/Metro/TP/Debug.hs, dist/build/Metro/TP/Debug.o )
[ 6 of 12] Compiling Metro.Utils      ( src/Metro/Utils.hs, dist/build/Metro/Utils.o )
[ 7 of 12] Compiling Metro.Conn       ( src/Metro/Conn.hs, dist/build/Metro/Conn.o )

src/Metro/Conn.hs:50:3: error:
    ‘askUnliftIO’ is not a (visible) method of class ‘MonadUnliftIO’
   |
50 |   askUnliftIO = ConnT $
   |   ^^^^^^^^^^^
cabal: Leaving directory '/tmp/cabal-tmp-8844/metro-0.1.0.0'
cabal: Error: some packages failed to install:
metro-0.1.0.0-4oJPonuyuOP6I9Jf9vrX74 failed during the building phase. The
exception was:
ExitFailure 1