Resolving dependencies...
Configuring semigroups-0.18.4...
Configuring storable-complex-0.2.2...
Building storable-complex-0.2.2...
Building semigroups-0.18.4...
Installed storable-complex-0.2.2
Installed semigroups-0.18.4
Configuring hmatrix-0.18.2.0...
Building hmatrix-0.18.2.0...
Installed hmatrix-0.18.2.0
Configuring Learning-0.0.2...
Building Learning-0.0.2...
Failed to install Learning-0.0.2
Build log ( /home/builder/.cabal/logs/ghc-8.2.2/Learning-0.0.2-HkFfsHCaRw9G4ZXPrY1ae4.log ):
cabal: Entering directory '/tmp/cabal-tmp-27637/Learning-0.0.2'
Configuring Learning-0.0.2...
Preprocessing library for Learning-0.0.2..
Building library for Learning-0.0.2..
[1 of 2] Compiling Learning         ( src/Learning.hs, dist/build/Learning.o )
[2 of 2] Compiling Paths_Learning   ( dist/build/autogen/Paths_Learning.hs, dist/build/Paths_Learning.o )
Preprocessing executable 'learning-pca' for Learning-0.0.2..
Building executable 'learning-pca' for Learning-0.0.2..

app/MainPCA2.lhs:1:1: error:
    File name does not match module name:
    Saw: ‘Main’
    Expected: ‘MainPCA2’
  |
1 | Advanced Principal Components Analysis (PCA) demo
  | ^
cabal: Leaving directory '/tmp/cabal-tmp-27637/Learning-0.0.2'
cabal: Error: some packages failed to install:
Learning-0.0.2-HkFfsHCaRw9G4ZXPrY1ae4 failed during the building phase. The
exception was:
ExitFailure 1