dcm4chee-arc-ui2 build broken: Error: Version of @angular/compiler-cli needs to be 2.3.1 or greater. Current version is "undefined"

[gunterze]

[INFO] > dcm4chee-arc-ui2@0.0.0 prod /home/gunter/work/dcm4chee-arc-light/dcm4chee-arc-ui2
[INFO] > ng build -prod
[INFO] 
[INFO] Version of @angular/compiler-cli needs to be 2.3.1 or greater. Current version is "undefined".
[INFO] Error: Version of @angular/compiler-cli needs to be 2.3.1 or greater. Current version is "undefined".
[INFO]     at Object.<anonymous> (/home/gunter/work/dcm4chee-arc-light/dcm4chee-arc-ui2/node_modules/@ngtools/webpack/src/index.js:27:11)
[INFO]     at Module._compile (module.js:570:32)
[INFO]     at Object.Module._extensions..js (module.js:579:10)
[INFO]     at Module.load (module.js:487:32)
[INFO]     at tryModuleLoad (module.js:446:12)
[INFO]     at Function.Module._load (module.js:438:3)
[INFO]     at Module.require (module.js:497:17)
[INFO]     at require (internal/module.js:20:19)
[INFO]     at Object.<anonymous> (/home/gunter/work/dcm4chee-arc-light/dcm4chee-arc-ui2/node_modules/angular-cli/models/webpack-build-typescript.js:5:17)
[INFO]     at Module._compile (module.js:570:32)
[INFO]     at Object.Module._extensions..js (module.js:579:10)
[INFO]     at Module.load (module.js:487:32)
[INFO]     at tryModuleLoad (module.js:446:12)
[INFO]     at Function.Module._load (module.js:438:3)
[INFO]     at Module.require (module.js:497:17)
[INFO]     at require (internal/module.js:20:19)
[INFO]     at Object.<anonymous> (/home/gunter/work/dcm4chee-arc-light/dcm4chee-arc-ui2/node_modules/angular-cli/models/webpack-config.js:2:34)
[INFO]     at Module._compile (module.js:570:32)
[INFO]     at Object.Module._extensions..js (module.js:579:10)
[INFO]     at Module.load (module.js:487:32)
[INFO]     at tryModuleLoad (module.js:446:12)
[INFO]     at Function.Module._load (module.js:438:3)
[INFO]     at Module.require (module.js:497:17)
[INFO]     at require (internal/module.js:20:19)
[INFO]     at Object.<anonymous> (/home/gunter/work/dcm4chee-arc-light/dcm4chee-arc-ui2/node_modules/angular-cli/tasks/build-webpack.js:6:24)
[INFO]     at Module._compile (module.js:570:32)
[INFO]     at Object.Module._extensions..js (module.js:579:10)
[INFO]     at Module.load (module.js:487:32)
[INFO]     at tryModuleLoad (module.js:446:12)
[INFO]     at Function.Module._load (module.js:438:3)
[INFO]     at Module.require (module.js:497:17)
[INFO]     at require (internal/module.js:20:19)
[INFO]     at Object.<anonymous> (/home/gunter/work/dcm4chee-arc-light/dcm4chee-arc-ui2/node_modules/angular-cli/commands/build.js:3:23)
[INFO]     at Module._compile (module.js:570:32)
[INFO]     at Object.Module._extensions..js (module.js:579:10)
[INFO]     at Module.load (module.js:487:32)
[INFO]     at tryModuleLoad (module.js:446:12)
[INFO]     at Function.Module._load (module.js:438:3)
[INFO]     at Module.require (module.js:497:17)
[INFO]     at require (internal/module.js:20:19)
[INFO]     at Class.includedCommands (/home/gunter/work/dcm4chee-arc-light/dcm4chee-arc-ui2/node_modules/angular-cli/addon/index.js:21:16)
[INFO]     at /home/gunter/work/dcm4chee-arc-light/dcm4chee-arc-ui2/node_modules/angular-cli/lib/models/project.js:392:61
[INFO]     at Array.forEach (native)
[INFO]     at Project.addonCommands (/home/gunter/work/dcm4chee-arc-light/dcm4chee-arc-ui2/node_modules/angular-cli/lib/models/project.js:391:15)
[INFO]     at Project.eachAddonCommand (/home/gunter/work/dcm4chee-arc-light/dcm4chee-arc-ui2/node_modules/angular-cli/lib/models/project.js:426:30)
[INFO]     at module.exports (/home/gunter/work/dcm4chee-arc-light/dcm4chee-arc-ui2/node_modules/angular-cli/lib/cli/lookup-command.js:33:13)
[INFO]     at CLI.<anonymous> (/home/gunter/work/dcm4chee-arc-light/dcm4chee-arc-ui2/node_modules/angular-cli/lib/cli/cli.js:34:26)
[INFO]     at tryCatch (/home/gunter/work/dcm4chee-arc-light/dcm4chee-arc-ui2/node_modules/rsvp/dist/rsvp.js:539:12)
[INFO]     at invokeCallback (/home/gunter/work/dcm4chee-arc-light/dcm4chee-arc-ui2/node_modules/rsvp/dist/rsvp.js:554:13)
[INFO]     at publish (/home/gunter/work/dcm4chee-arc-light/dcm4chee-arc-ui2/node_modules/rsvp/dist/rsvp.js:522:7)
[INFO]     at flush (/home/gunter/work/dcm4chee-arc-light/dcm4chee-arc-ui2/node_modules/rsvp/dist/rsvp.js:2414:5)
[INFO]     at _combinedTickCallback (internal/process/next_tick.js:67:7)
[INFO]     at process._tickCallback (internal/process/next_tick.js:98:9)
[ERROR] 
[ERROR] npm ERR! Linux 4.4.0-66-generic
[ERROR] npm ERR! argv "/home/gunter/work/dcm4chee-arc-light/dcm4chee-arc-ui2/node/node" "/home/gunter/work/dcm4chee-arc-light/dcm4chee-arc-ui2/node/node_modules/npm/bin/npm-cli.js" "run-script" "prod"
[ERROR] npm ERR! node v6.9.1
[ERROR] npm ERR! npm  v3.10.6
[ERROR] npm ERR! code ELIFECYCLE
[ERROR] npm ERR! dcm4chee-arc-ui2@0.0.0 prod: `ng build -prod`
[ERROR] npm ERR! Exit status 1
[ERROR] npm ERR! 
[ERROR] npm ERR! Failed at the dcm4chee-arc-ui2@0.0.0 prod script 'ng build -prod'.
[ERROR] npm ERR! Make sure you have the latest version of node.js and npm installed.
[ERROR] npm ERR! If you do, this is most likely a problem with the dcm4chee-arc-ui2 package,
[ERROR] npm ERR! not with npm itself.
[ERROR] npm ERR! Tell the author that this fails on your system:
[ERROR] npm ERR!     ng build -prod
[ERROR] npm ERR! You can get information on how to open an issue for this project with:
[ERROR] npm ERR!     npm bugs dcm4chee-arc-ui2
[ERROR] npm ERR! Or if that isn't available, you can get their info via:
[ERROR] npm ERR!     npm owner ls dcm4chee-arc-ui2
[ERROR] npm ERR! There is likely additional logging output above.
[ERROR] 
[ERROR] npm ERR! Please include the following file with any support request:
[ERROR] npm ERR!     /home/gunter/work/dcm4chee-arc-light/dcm4chee-arc-ui2/npm-debug.log

s.o. https://groups.google.com/forum/#!topic/dcm4che/22zaz4YnFus