Resolving dependencies...
Build profile: -w ghc-9.6.3 -O0
In order, the following will be built (use -v for more details):
 - red-black-tree-0.1.0.0 (first run)
Configuring red-black-tree-0.1.0.0...
Preprocessing library for red-black-tree-0.1.0.0..
Building library for red-black-tree-0.1.0.0..
[1 of 5] Compiling Data.RedBlackTree.BinaryTree ( src/Data/RedBlackTree/BinaryTree.hs, /home/builder/builder-dir/build-cache/tmp-install/dist-newstyle/build/x86_64-linux/ghc-9.6.3/red-black-tree-0.1.0.0/noopt/build/Data/RedBlackTree/BinaryTree.o, /home/builder/builder-dir/build-cache/tmp-install/dist-newstyle/build/x86_64-linux/ghc-9.6.3/red-black-tree-0.1.0.0/noopt/build/Data/RedBlackTree/BinaryTree.dyn_o )
[2 of 5] Compiling Data.RedBlackTree.Internal ( src/Data/RedBlackTree/Internal.hs, /home/builder/builder-dir/build-cache/tmp-install/dist-newstyle/build/x86_64-linux/ghc-9.6.3/red-black-tree-0.1.0.0/noopt/build/Data/RedBlackTree/Internal.o, /home/builder/builder-dir/build-cache/tmp-install/dist-newstyle/build/x86_64-linux/ghc-9.6.3/red-black-tree-0.1.0.0/noopt/build/Data/RedBlackTree/Internal.dyn_o )
[3 of 5] Compiling Data.RedBlackTree.TreeFamily ( src/Data/RedBlackTree/TreeFamily.hs, /home/builder/builder-dir/build-cache/tmp-install/dist-newstyle/build/x86_64-linux/ghc-9.6.3/red-black-tree-0.1.0.0/noopt/build/Data/RedBlackTree/TreeFamily.o, /home/builder/builder-dir/build-cache/tmp-install/dist-newstyle/build/x86_64-linux/ghc-9.6.3/red-black-tree-0.1.0.0/noopt/build/Data/RedBlackTree/TreeFamily.dyn_o )
[4 of 5] Compiling Data.RedBlackTree.InsertionAlgorithm ( src/Data/RedBlackTree/InsertionAlgorithm.hs, /home/builder/builder-dir/build-cache/tmp-install/dist-newstyle/build/x86_64-linux/ghc-9.6.3/red-black-tree-0.1.0.0/noopt/build/Data/RedBlackTree/InsertionAlgorithm.o, /home/builder/builder-dir/build-cache/tmp-install/dist-newstyle/build/x86_64-linux/ghc-9.6.3/red-black-tree-0.1.0.0/noopt/build/Data/RedBlackTree/InsertionAlgorithm.dyn_o )
[5 of 5] Compiling Data.RedBlackTree ( src/Data/RedBlackTree.hs, /home/builder/builder-dir/build-cache/tmp-install/dist-newstyle/build/x86_64-linux/ghc-9.6.3/red-black-tree-0.1.0.0/noopt/build/Data/RedBlackTree.o, /home/builder/builder-dir/build-cache/tmp-install/dist-newstyle/build/x86_64-linux/ghc-9.6.3/red-black-tree-0.1.0.0/noopt/build/Data/RedBlackTree.dyn_o )
Preprocessing test suite 'red-black-tree-test' for red-black-tree-0.1.0.0..
Building test suite 'red-black-tree-test' for red-black-tree-0.1.0.0..
ghc-9.6.3: could not execute: hspec-discover