The Haskell Debugger is ready to use with GHC-9.14! The installation, configuration, and talks can be found in the official website. The tl;dr first step is installing the debugger: $ ghc --version # MUST BE GHC 9.14 The Glorious Glasgow Haskell Compilation System, version 9.14.1 $ cabal install haskell-debugger --allow-newer=base,time,containers,ghc,ghc-bignum,template-haskell --enable-executable-dynamic # ON WINDOWS, DO NOT PASS --enable-executable-dynamic ... $ ~/.local/bin/hdb --version ...