When running cabal, it tells me Note: there is a new version of cabal-install available. To upgrade, run: cabal install cabal-install And when I do that, it does a bunch of stuff and then [68 of 70] Compiling Distribution.Simple.Bench ( E:\Temp\Cabal-1.18.1.3-7348\Cabal-1.18.1.3\Distribution\Simple\Bench.hs, E:\Temp\Cabal-1.18.1.3-7348\Cabal-1.18 .1.3\dist\setup\Distribution\Simple\Bench.o ) [69 of 70] Compiling Distribution.Simple ( E:\Temp\Cabal-1.18.1.3-7348\Cabal-1.18.1.3\Distribution\Simple.hs, E:\Temp\Cabal-1.18.1.3-7348\Cabal-1.18.1.3\dist\setup\Distribution\Simple.o ) [70 of 70] Compiling Main ( E:\Temp\Cabal-1.18.1.3-7348\Cabal-1.18.1.3\Setup.hs, E:\Temp\Cabal-1.18.1.3-7348\Cabal-1.18.1.3\dist\setup\Main.o ) Linking E:\Temp\Cabal-1.18.1.3-7348\Cabal-1.18.1.3\dist\setup\setup.exe ... Configuring Cabal-1.18.1.3... setup.exe: does not exist Failed to install Cabal-1.18.1.3 cabal: Error: some packages failed to install: Cabal-1.18.1.3 failed during the configure step. The exception was: ExitFailure 1 cabal-install-1.18.0.3 depends on Cabal-1.18.1.3 which failed to install. [C:\Program Files (x86)\Haskell-Platform] This is, as I recall, where I got stuck trying to get a newer Leksah installed. Upon finishing, it deletes the temp directory tree, so I can't see if there's anything obviously strange with the file it produced. How do I troubleshoot this?