aragon build error

 ℹ This is the configuration for your development deployment:
    Ethereum Node: ws://localhost:8545
    ENS registry: 0x5f6f7e8cc7346a11ca2def8f827b7a0b612c56a1
    APM registry: aragonpm.eth
    DAO address: 0xE9866fE6dF20F032E62Cc3094EdDe9748fE51753

    Opening http://localhost:3000/#/0xE9866fE6dF20F032E62Cc3094EdDe9748fE51753 to view your DAO
(node:12216) UnhandledPromiseRejectionWarning: Error: Error: Command failed: npm run start:local
sh: 1: copy-aragon-ui-assets: not found

npm ERR! Linux 4.15.0-43-generic
npm ERR! argv "/usr/bin/node" "/usr/bin/npm" "run" "ui-assets"
npm ERR! node v8.10.0
npm ERR! npm  v3.5.2
npm ERR! file sh
npm ERR! code ELIFECYCLE
npm ERR! errno ENOENT
npm ERR! syscall spawn
npm ERR! aragon@0.6.0 ui-assets: `copy-aragon-ui-assets -n aragon-ui ./build`
npm ERR! spawn ENOENT
npm ERR!
npm ERR! Failed at the aragon@0.6.0 ui-assets script 'copy-aragon-ui-assets -n aragon-ui ./build'.
npm ERR! Make sure you have the latest version of node.js and npm installed.
npm ERR! If you do, this is most likely a problem with the aragon package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR!     copy-aragon-ui-assets -n aragon-ui ./build
npm ERR! You can get information on how to open an issue for this project with:
npm ERR!     npm bugs aragon
npm ERR! Or if that isn't available, you can get their info via:
npm ERR!     npm owner ls aragon
npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request:
npm ERR!     /home/joe/.aragon/wrapper-2d79d2b9373d8b89bb28a7ecd613fb6373ac2d43/npm-debug.log
child_process.js:644
    throw err;
    ^

Error: Command failed:
npm run ui-assets &&
REACT_APP_PACKAGE_VERSION=0.6.0 parcel serve src/index.html --port 3000 --out-dir ./build --no-cache

    at checkExecSyncError (child_process.js:601:13)
    at execSync (child_process.js:641:13)
    at Object.<anonymous> (/home/joe/.aragon/wrapper-2d79d2b9373d8b89bb28a7ecd613fb6373ac2d43/scripts/start:12:1)
    at Module._compile (module.js:652:30)
    at Object.Module._extensions..js (module.js:663:10)
    at Module.load (module.js:565:32)
    at tryModuleLoad (module.js:505:12)
    at Function.Module._load (module.js:497:3)
    at Function.Module.runMain (module.js:693:10)
    at startup (bootstrap_node.js:188:16)

npm ERR! Linux 4.15.0-43-generic
npm ERR! argv "/usr/bin/node" "/usr/bin/npm" "start"
npm ERR! node v8.10.0
npm ERR! npm  v3.5.2
npm ERR! code ELIFECYCLE
npm ERR! aragon@0.6.0 start: `scripts/start`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the aragon@0.6.0 start script 'scripts/start'.
npm ERR! Make sure you have the latest version of node.js and npm installed.
npm ERR! If you do, this is most likely a problem with the aragon package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR!     scripts/start
npm ERR! You can get information on how to open an issue for this project with:
npm ERR!     npm bugs aragon
npm ERR! Or if that isn't available, you can get their info via:
npm ERR!     npm owner ls aragon
npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request:
npm ERR!     /home/joe/.aragon/wrapper-2d79d2b9373d8b89bb28a7ecd613fb6373ac2d43/npm-debug.log

npm ERR! Linux 4.15.0-43-generic
npm ERR! argv "/usr/bin/node" "/usr/bin/npm" "run" "start:local"
npm ERR! node v8.10.0
npm ERR! npm  v3.5.2
npm ERR! code ELIFECYCLE
npm ERR! aragon@0.6.0 start:local: `scripts/launch-local.sh`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the aragon@0.6.0 start:local script 'scripts/launch-local.sh'.
npm ERR! Make sure you have the latest version of node.js and npm installed.
npm ERR! If you do, this is most likely a problem with the aragon package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR!     scripts/launch-local.sh
npm ERR! You can get information on how to open an issue for this project with:
npm ERR!     npm bugs aragon
npm ERR! Or if that isn't available, you can get their info via:
npm ERR!     npm owner ls aragon
npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request:
npm ERR!     /home/joe/.aragon/wrapper-2d79d2b9373d8b89bb28a7ecd613fb6373ac2d43/npm-debug.log


> aragon@0.6.0 start:local /home/joe/.aragon/wrapper-2d79d2b9373d8b89bb28a7ecd613fb6373ac2d43
> scripts/launch-local.sh

Running aragon/aragon on local environment settings...

Found a local IPFS daemon running...
The app will be configured to connect and serve assets from from the default gateway (http://localhost:8080/ipfs).
Also defaulting the asset bridge to IPFS.


> aragon@0.6.0 start /home/joe/.aragon/wrapper-2d79d2b9373d8b89bb28a7ecd613fb6373ac2d43
> scripts/start


> aragon@0.6.0 ui-assets /home/joe/.aragon/wrapper-2d79d2b9373d8b89bb28a7ecd613fb6373ac2d43
> copy-aragon-ui-assets -n aragon-ui ./build


    at /usr/local/lib/node_modules/@aragon/cli/dist/commands/run.js:412:29
    at <anonymous>
    at process._tickCallback (internal/process/next_tick.js:188:7)
(node:12216) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 3)
(node:12216) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.