Resolving dependencies...
Configuring ansi-terminal-0.6.2.3...
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Installed base-compat-0.9.1
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Configuring base64-bytestring-1.0.0.1...
Installed base-unicode-symbols-0.2.2.4
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Installed SHA-1.6.4.2
Building base64-bytestring-1.0.0.1...
Building byteable-0.1.1...
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Installed byteable-0.1.1
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Configuring digest-0.0.1.2...
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Configuring extensible-exceptions-0.1.1.4...
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Configuring cereal-0.5.4.0...
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Building tls-1.3.8...
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Building pandoc-1.18...
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Configuring heckle-2.0.1.0...
Building heckle-2.0.1.0...
Failed to install heckle-2.0.1.0
Build log ( /home/builder/.cabal/logs/heckle-2.0.1.0.log ):
cabal: Entering directory '/tmp/cabal-tmp-12382/heckle-2.0.1.0'
Configuring heckle-2.0.1.0...
Building heckle-2.0.1.0...
Preprocessing library heckle-2.0.1.0...
[1 of 1] Compiling Heckle           ( src/Heckle.hs, dist/build/Heckle.o )
Preprocessing executable 'heckle' for heckle-2.0.1.0...
[1 of 1] Compiling Main             ( heckle/Main.hs, dist/build/heckle/heckle-tmp/Main.o )

heckle/Main.hs:14:1: error:
    Failed to load interface for ‘Files’
    Use -v to see a list of the files searched for.
cabal: Leaving directory '/tmp/cabal-tmp-12382/heckle-2.0.1.0'
cabal: Error: some packages failed to install:
heckle-2.0.1.0 failed during the building phase. The exception was:
ExitFailure 1