By default, cmake is installed in C:\Program Files\CMake, so this will fail on all default installations. As far as I see, the culprit is in configure, line 1728: `(cd $LLVM_BUILD_DIR && eval "$CFG_CMAKE" $CMAKE_ARGS)` A fix for this would be changing this line to `(cd $LLVM_BUILD_DIR && eval "\"$CFG_CMAKE\"" $CMAKE_ARGS)`