I installed gloss, and then the binary for llvm (http://llvm.org/builds/ ) But still gloss-examples fail, because it requires gloss-raster, which fails (below). I see some discussion of this from last year (https://mail.haskell.org/pipermail/haskell-cafe/2014-March/113001.html), Do I need to do some path manipulations to get this to work? I see llc & opt as mentioned in that note installed under mingw, but not under the llvm installed site. ------------------------------------------------------------------------ <C:\Windows\System32>cabal install gloss-raster Resolving dependencies... Configuring gloss-raster-1.9.2.1... Building gloss-raster-1.9.2.1... Failed to install gloss-raster-1.9.2.1 Build log ( C:\Users\guthrie\AppData\Roaming\cabal\logs\gloss-raster-1.9.2.1.log ): Building gloss-raster-1.9.2.1... Preprocessing library gloss-raster-1.9.2.1... [1 of 2] Compiling Graphics.Gloss.Raster.Array ( Graphics\Gloss\Raster\Array.hs, dist\build\Graphics\Gloss\Raster\Array.o ) <no location info>: Warning: Couldn't figure out LLVM version! Make sure you have installed LLVM cabal: Error: some packages failed to install: gloss-raster-1.9.2.1 failed during the building phase. The exception was: ExitFailure 1 Running with -v, it adds: <no location info>: Warning: Couldn't figure out LLVM version! Make sure you have installed LLVM 8.3 found on system at: e:\Plang\Haskell Platform\bin\ghc.exe Using ghc-pkg version 7.8.3 found on system at: e:\Plang\Haskell Platform\bin\ghc-pkg.exe No ghcjs found No ghcjs-pkg found No greencard found -------------------------------------------