Installation fails on Ubuntu 19.10

Installation fails on Ubuntu 19.10.

I tried both the latest release and development version.

`cabal update && cabal install implicit`

results in:
```
Failed to install snap-core-1.0.4.1
Build log ( /home/michael/.cabal/logs/ghc-8.6.5/snap-core-1.0.4.1-6GpgSzHqMHF9rtbD7C1Mss.log ):
cabal: Entering directory '/tmp/cabal-tmp-18783/snap-core-1.0.4.1'
Configuring snap-core-1.0.4.1...
Preprocessing library for snap-core-1.0.4.1..
Building library for snap-core-1.0.4.1..
[ 1 of 18] Compiling Snap.Internal.Debug ( src/Snap/Internal/Debug.hs, dist/build/Snap/Internal/Debug.o )
[ 2 of 18] Compiling Snap.Types.Headers ( src/Snap/Types/Headers.hs, dist/build/Snap/Types/Headers.o )
[ 3 of 18] Compiling Snap.Internal.Http.Types ( src/Snap/Internal/Http/Types.hs, dist/build/Snap/Internal/Http/Types.o )
[ 4 of 18] Compiling Snap.Internal.Test.Assertions ( src/Snap/Internal/Test/Assertions.hs, dist/build/Snap/Internal/Test/Assertions.o )
[ 5 of 18] Compiling Snap.Internal.Parsing ( src/Snap/Internal/Parsing.hs, dist/build/Snap/Internal/Parsing.o )
[ 6 of 18] Compiling Snap.Internal.Core ( src/Snap/Internal/Core.hs, dist/build/Snap/Internal/Core.o )
[ 7 of 18] Compiling Snap.Internal.Routing ( src/Snap/Internal/Routing.hs, dist/build/Snap/Internal/Routing.o )
[ 8 of 18] Compiling Snap.Internal.Instances ( src/Snap/Internal/Instances.hs, dist/build/Snap/Internal/Instances.o )
[ 9 of 18] Compiling Snap.Core ( src/Snap/Core.hs, dist/build/Snap/Core.o )
[10 of 18] Compiling Snap.Internal.Util.FileUploads ( src/Snap/Internal/Util/FileUploads.hs, dist/build/Snap/Internal/Util/FileUploads.o )
[11 of 18] Compiling Snap.Internal.Util.FileServe ( src/Snap/Internal/Util/FileServe.hs, dist/build/Snap/Internal/Util/FileServe.o )
[12 of 18] Compiling Snap.Internal.Test.RequestBuilder ( src/Snap/Internal/Test/RequestBuilder.hs, dist/build/Snap/Internal/Test/RequestBuilder.o )

src/Snap/Internal/Test/RequestBuilder.hs:62:46: error:
Module ‘System.Random’ does not export ‘Random(randomIO)’
|
62 | import System.Random (Random (randomIO))
| ^^^^^^^^^^^^^^^^^
cabal: Leaving directory '/tmp/cabal-tmp-18783/snap-core-1.0.4.1'
Completed mwc-random-0.14.0.0
Completed aeson-1.5.2.0
Completed JuicyPixels-3.3.5
Warning: could not create a symlink in /home/michael/.cabal/bin for
hspec-discover because the file exists there already but is not managed by
cabal. You can create a symlink for this executable manually if you wish. The
executable file has been installed at /home/michael/.cabal/bin/hspec-discover
cabal: Error: some packages failed to install:
implicit-0.3.0.1-JpQge8jLBWr7fHFhjxtDHs depends on implicit-0.3.0.1 which
failed to install.
snap-core-1.0.4.1-6GpgSzHqMHF9rtbD7C1Mss failed during the building phase. The
exception was:
ExitFailure 1
snap-server-1.1.1.2-7ddVWTdfPSZ1Vyhm6CjjCf depends on snap-server-1.1.1.2
which failed to install.
```

When I try the development version:
I installed happy using `sudo apt install happy` because of an initial message complaining it wasn't installed. Then, `cabal update && cabal install hashmap parallel parsec plugins JuicyPixels blaze-builder blaze-markup blaze-svg storable-endian unordered-containers vector-space` results in:
```
Starting plugins-1.6.0
Building plugins-1.6.0
Failed to install plugins-1.6.0
Build log ( /home/michael/.cabal/logs/ghc-8.6.5/plugins-1.6.0-LYAmT0pbUYW3zNXudcHEu3.log ):
cabal: Entering directory '/tmp/cabal-tmp-7402/plugins-1.6.0'
Configuring plugins-1.6.0...
configure: WARNING: unrecognized options: --with-compiler
checking build system type... x86_64-unknown-linux-gnu
checking for ghc... ghc
checking for value of __GLASGOW_HASKELL__... 806
checking for ghc library directory... /usr/lib/ghc
checking for gcc... /usr/bin/x86_64-linux-gnu-gcc
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking for suffix of executables...
checking whether we are cross compiling... no
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether /usr/bin/x86_64-linux-gnu-gcc accepts -g... yes
checking for /usr/bin/x86_64-linux-gnu-gcc option to accept ISO C89... none needed
checking for arc4random... no
checking for a BSD-compatible install... /usr/bin/install -c
configure: creating ./config.status
config.status: creating config.mk
config.status: creating testsuite/makewith/io/TestIO.conf
config.status: creating testsuite/makewith/unsafeio/Unsafe.conf
config.status: creating config.h
configure: WARNING: unrecognized options: --with-compiler
Preprocessing library for plugins-1.6.0..
Building library for plugins-1.6.0..
[ 1 of 12] Compiling System.Plugins.Consts ( src/System/Plugins/Consts.hs, dist/build/System/Plugins/Consts.o )
[ 2 of 12] Compiling System.Plugins.LoadTypes ( src/System/Plugins/LoadTypes.hs, dist/build/System/Plugins/LoadTypes.o )
[ 3 of 12] Compiling System.Plugins.Env ( src/System/Plugins/Env.hs, dist/build/System/Plugins/Env.o )

src/System/Plugins/Env.hs:334:114: error:
• Variable not in scope:
installedPackageId :: InstalledPackageInfo -> a1
• Perhaps you meant data constructor ‘InstalledPackageInfo’ (imported from Distribution.InstalledPackageInfo)
|
334 | addOnePkg p fm' = addToPkgEnvs (addToPkgEnvs (addToPkgEnvs fm' (display $ sourcePackageId p) p) (display $ installedPackageId p) p)
| ^^^^^^^^^^^^^^^^^^

src/System/Plugins/Env.hs:341:11: error:
• Variable not in scope: installedPackageId :: p -> a0
• Perhaps you meant data constructor ‘InstalledPackageInfo’ (imported from Distribution.InstalledPackageInfo)
|
341 | | installedPackageId pkgconf1 >= installedPackageId pkgconf2 = pkgconf1
| ^^^^^^^^^^^^^^^^^^

src/System/Plugins/Env.hs:341:42: error:
• Variable not in scope: installedPackageId :: p -> a0
• Perhaps you meant data constructor ‘InstalledPackageInfo’ (imported from Distribution.InstalledPackageInfo)
|
341 | | installedPackageId pkgconf1 >= installedPackageId pkgconf2 = pkgconf1
| ^^^^^^^^^^^^^^^^^^

src/System/Plugins/Env.hs:353:48: error:
Variable not in scope: defaultProgramConfiguration :: ProgramDb
|
353 | pc <- configureAllKnownPrograms silent defaultProgramConfiguration
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^

src/System/Plugins/Env.hs:369:44: error:
Variable not in scope: defaultProgramConfiguration :: ProgramDb
|
369 | pc <- configureAllKnownPrograms silent defaultProgramConfiguration
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^
cabal: Leaving directory '/tmp/cabal-tmp-7402/plugins-1.6.0'
cabal: Error: some packages failed to install:
plugins-1.6.0-LYAmT0pbUYW3zNXudcHEu3 failed during the building phase. The
exception was:
ExitFailure 1
```