Additionally in building on intraweb 14.0.x that come with the default XE5 contrary to the install.txt You need to do:
msbuild IW14TMSDxx.dproj
msbuild IW14TMSDEDxx.dproj
msbuild IW14TMSGRIDDxx.dproj
msbuild IW14TMSGRIDDEDxx.dproj
msbuild IW14TMSXLSDxx.dproj
But if you build the package using intraweb 14.0.18+ you need to use:
msbuild IW14TMSDxxUPD.dproj
msbuild IW14TMSDEDxxUPD.dproj
msbuild IW14TMSGRIDDxxUPD.dproj
msbuild IW14TMSGRIDDEDxxUPD.dproj
msbuild IW14TMSXLSDxxUPD.dproj
Otherwise the build will fail because the intraweb package was changed and the build couldn't find it.