Resolving dependencies... Build profile: -w ghc-9.6.3 -O0 In order, the following will be built (use -v for more details): - pure-sum-0.1.0.0 (first run) Configuring pure-sum-0.1.0.0... Preprocessing library for pure-sum-0.1.0.0.. Building library for pure-sum-0.1.0.0.. [1 of 2] Compiling Data.Sum.Pure ( src/Data/Sum/Pure.hs, /home/builder/builder-dir/build-cache/tmp-install/dist-newstyle/build/x86_64-linux/ghc-9.6.3/pure-sum-0.1.0.0/noopt/build/Data/Sum/Pure.o, /home/builder/builder-dir/build-cache/tmp-install/dist-newstyle/build/x86_64-linux/ghc-9.6.3/pure-sum-0.1.0.0/noopt/build/Data/Sum/Pure.dyn_o ) [2 of 2] Compiling Paths_pure_sum ( /home/builder/builder-dir/build-cache/tmp-install/dist-newstyle/build/x86_64-linux/ghc-9.6.3/pure-sum-0.1.0.0/noopt/build/autogen/Paths_pure_sum.hs, /home/builder/builder-dir/build-cache/tmp-install/dist-newstyle/build/x86_64-linux/ghc-9.6.3/pure-sum-0.1.0.0/noopt/build/Paths_pure_sum.o, /home/builder/builder-dir/build-cache/tmp-install/dist-newstyle/build/x86_64-linux/ghc-9.6.3/pure-sum-0.1.0.0/noopt/build/Paths_pure_sum.dyn_o ) Preprocessing test suite 'spec' for pure-sum-0.1.0.0.. Building test suite 'spec' for pure-sum-0.1.0.0.. ghc-9.6.3: could not execute: hspec-discover