Resolving dependencies... Starting StateVar-1.2.2 Starting call-stack-0.4.0 Starting base-orphans-0.8.5 Starting base-compat-0.12.0 Building StateVar-1.2.2 Building call-stack-0.4.0 Building base-orphans-0.8.5 Building base-compat-0.12.0 Completed call-stack-0.4.0 Starting data-default-class-0.1.2.0 Completed StateVar-1.2.2 Starting dlist-1.0 Building data-default-class-0.1.2.0 Building dlist-1.0 Completed data-default-class-0.1.2.0 Starting hashable-1.3.4.1 Building hashable-1.3.4.1 Completed base-orphans-0.8.5 Starting haskell-lexer-1.1 Completed dlist-1.0 Starting indexed-traversable-0.1.1 Building haskell-lexer-1.1 Completed base-compat-0.12.0 Starting integer-logarithms-1.0.3.1 Building indexed-traversable-0.1.1 Building integer-logarithms-1.0.3.1 Completed hashable-1.3.4.1 Starting old-locale-1.0.0.7 Building old-locale-1.0.0.7 Completed integer-logarithms-1.0.3.1 Starting parallel-3.2.2.0 Building parallel-3.2.2.0 Completed old-locale-1.0.0.7 Starting primitive-0.7.2.0 Building primitive-0.7.2.0 Completed indexed-traversable-0.1.1 Starting reflection-2.1.6 Building reflection-2.1.6 Completed parallel-3.2.2.0 Starting semigroups-0.19.2 Building semigroups-0.19.2 Completed semigroups-0.19.2 Starting split-0.2.3.4 Building split-0.2.3.4 Completed split-0.2.3.4 Starting splitmix-0.1.0.3 Building splitmix-0.1.0.3 Completed reflection-2.1.6 Starting tagged-0.8.6.1 Building tagged-0.8.6.1 Completed splitmix-0.1.0.3 Starting th-abstraction-0.4.3.0 Building th-abstraction-0.4.3.0 Completed tagged-0.8.6.1 Starting transformers-compat-0.7 Building transformers-compat-0.7 Completed primitive-0.7.2.0 Starting void-0.7.3 Building void-0.7.3 Completed transformers-compat-0.7 Starting contravariant-1.5.5 Completed th-abstraction-0.4.3.0 Starting data-default-instances-containers-0.0.1 Building contravariant-1.5.5 Completed void-0.7.3 Starting data-default-instances-dlist-0.0.1 Building data-default-instances-containers-0.0.1 Building data-default-instances-dlist-0.0.1 Completed data-default-instances-containers-0.0.1 Starting base-compat-batteries-0.12.0 Completed data-default-instances-dlist-0.0.1 Starting unordered-containers-0.2.14.0 Building base-compat-batteries-0.12.0 Building unordered-containers-0.2.14.0 Completed contravariant-1.5.5 Starting time-compat-1.9.6.1 Building time-compat-1.9.6.1 Completed base-compat-batteries-0.12.0 Starting data-fix-0.3.2 Building data-fix-0.3.2 Completed time-compat-1.9.6.1 Starting data-default-instances-old-locale-0.0.1 Building data-default-instances-old-locale-0.0.1 Completed data-default-instances-old-locale-0.0.1 Starting random-1.2.1 Building random-1.2.1 Completed data-fix-0.3.2 Starting distributive-0.6.2.1 Building distributive-0.6.2.1 Completed haskell-lexer-1.1 Starting vector-0.12.3.1 Building vector-0.12.3.1 Completed unordered-containers-0.2.14.0 Starting scientific-0.3.7.0 Completed distributive-0.6.2.1 Starting transformers-base-0.4.6 Building scientific-0.3.7.0 Building transformers-base-0.4.6 Completed transformers-base-0.4.6 Starting data-default-0.7.1.1 Building data-default-0.7.1.1 Completed data-default-0.7.1.1 Starting pretty-show-1.10 Completed scientific-0.3.7.0 Starting comonad-5.0.8 Building pretty-show-1.10 Building comonad-5.0.8 Completed random-1.2.1 Starting attoparsec-0.14.1 Building attoparsec-0.14.1 Completed comonad-5.0.8 Starting uuid-types-1.0.5 Building uuid-types-1.0.5 Completed pretty-show-1.10 Starting bifunctors-5.5.11 Building bifunctors-5.5.11 Completed uuid-types-1.0.5 Completed attoparsec-0.14.1 Completed bifunctors-5.5.11 Starting assoc-1.0.2 Starting profunctors-5.6.2 Starting semigroupoids-5.3.6 Building assoc-1.0.2 Building profunctors-5.6.2 Building semigroupoids-5.3.6 Completed assoc-1.0.2 Starting these-1.1.1.1 Building these-1.1.1.1 Completed these-1.1.1.1 Starting strict-0.4.0.1 Building strict-0.4.0.1 Completed profunctors-5.6.2 Starting invariant-0.5.4 Building invariant-0.5.4 Completed vector-0.12.3.1 Starting indexed-traversable-instances-0.1 Completed strict-0.4.0.1 Building indexed-traversable-instances-0.1 Completed semigroupoids-5.3.6 Starting free-5.1.7 Building free-5.1.7 Completed indexed-traversable-instances-0.1 Starting witherable-0.4.2 Starting semialign-1.2 Building witherable-0.4.2 Building semialign-1.2 Completed invariant-0.5.4 Completed semialign-1.2 Completed witherable-0.4.2 Starting aeson-2.0.1.0 Building aeson-2.0.1.0 Completed free-5.1.7 Starting adjunctions-4.4 Building adjunctions-4.4 Completed adjunctions-4.4 Starting kan-extensions-5.2.3 Building kan-extensions-5.2.3 Completed kan-extensions-5.2.3 Starting lens-5.0.1 Building lens-5.0.1 Completed aeson-2.0.1.0 Completed lens-5.0.1 Starting simple-amount-0.2.0 Failed to install simple-amount-0.2.0 Build log ( /home/builder/.cabal/logs/ghc-8.10.2/simple-amount-0.2.0-4Q6FalC1JjVKqXIqM22tKY.log ): cabal: Entering directory '/tmp/cabal-tmp-7655/simple-amount-0.2.0' Configuring simple-amount-0.2.0... cabal: Missing dependency on a foreign library: * Missing (or bad) C library: mpfr This problem can usually be solved by installing the system package that provides this library (you may need the "-dev" version). If the library is already installed but in a non-standard location then you can use the flags --extra-include-dirs= and --extra-lib-dirs= to specify where it is.If the library file does exist, it may contain errors that are caught by the C compiler at the preprocessing stage. In this case you can re-run configure with the verbosity flag -v3 to see the error messages. cabal: Leaving directory '/tmp/cabal-tmp-7655/simple-amount-0.2.0' cabal: Error: some packages failed to install: simple-amount-0.2.0-4Q6FalC1JjVKqXIqM22tKY failed during the configure step. The exception was: ExitFailure 1