HassIO, Node-RED and TTN

I am I bit lost here, a fresh installed HassIO on rPi3, Node-Red from add-on store. All works great, with exception on ttn plugin for node-red - cannot install.
Log below, any idea how to solve this?

Blockquote
[cont-init.d] 01-log-level.sh: exited 0.
[cont-init.d] 02-updates.sh: executing…
INFO: You are running the latest version of this add-on
[cont-init.d] 02-updates.sh: exited 0.
[cont-init.d] 10-requirements.sh: executing…
[cont-init.d] 10-requirements.sh: exited 0.
[cont-init.d] 11-warning.sh: executing…
[cont-init.d] 11-warning.sh: exited 0.
[cont-init.d] 20-config.sh: executing…
[cont-init.d] 20-config.sh: exited 0.
[cont-init.d] 80-system-packages.sh: executing…
[cont-init.d] 80-system-packages.sh: exited 0.
[cont-init.d] 81-npm-packages.sh: executing…
[cont-init.d] 81-npm-packages.sh: exited 0.
[cont-init.d] 82-user-scripts.sh: executing…
[cont-init.d] 82-user-scripts.sh: exited 0.
[cont-init.d] done.
[services.d] starting services
[services.d] done.
[email protected] start /opt
node $NODE_OPTIONS node_modules/node-red/red.js “–settings” “/etc/node-red/config.js”
9 Jul 15:17:06 - [info]
Welcome to Node-RED
===================
9 Jul 15:17:06 - [info] Node-RED version: v0.18.7
9 Jul 15:17:06 - [info] Node.js version: v8.9.3
9 Jul 15:17:06 - [info] Linux 4.4.50 arm LE
9 Jul 15:17:08 - [info] Loading palette nodes
9 Jul 15:17:12 - [warn] Cannot find Pi RPi.GPIO python library
9 Jul 15:17:22 - [warn] ------------------------------------------------------
9 Jul 15:17:22 - [warn] [node-red/rpi-gpio] Warning : Cannot find Pi RPi.GPIO python library
9 Jul 15:17:22 - [warn] [node-red-contrib-join/join] ‘join’ already registered by module node-red
9 Jul 15:17:22 - [warn] ------------------------------------------------------
9 Jul 15:17:22 - [info] Settings file : /etc/node-red/config.js
9 Jul 15:17:22 - [info] User directory : /config/node-red/
9 Jul 15:17:22 - [warn] No active project : using default flows file
9 Jul 15:17:22 - [info] Flows file : /config/node-red/flows.json
9 Jul 15:17:22 - [info] Starting flows
9 Jul 15:17:22 - [info] Started flows
9 Jul 15:17:22 - [info] Server now running at http://127.0.0.1:1880/
9 Jul 15:22:47 - [info] Installing module: node-red-contrib-ttn, version: 2.0.4
9 Jul 15:24:38 - [warn] Installation of module node-red-contrib-ttn failed:
9 Jul 15:24:38 - [warn] ------------------------------------------
9 Jul 15:24:38 - [warn]
[email protected] install /config/node-red/node_modules/grpc
node-pre-gyp install --fallback-to-build --library=static_library
node-pre-gyp WARN Tried to download(403): https://storage.googleapis.com/grpc-precompiled-binaries/node/grpc/v1.13.0/node-v57-linux-arm-musl.tar.gz
node-pre-gyp WARN Pre-built binaries not found for [email protected] and [email protected] (node-v57 ABI, musl) (falling back to source compile with node-gyp)
gyp ERR! configure error
gyp ERR! stack Error: Can’t find Python executable “python”, you can set the PYTHON env variable.
gyp ERR! stack at PythonFinder.failNoPython (/usr/lib/node_modules/npm/node_modules/node-gyp/lib/configure.js:483:19)
gyp ERR! stack at PythonFinder. (/usr/lib/node_modules/npm/node_modules/node-gyp/lib/configure.js:397:16)
gyp ERR! stack at F (/usr/lib/node_modules/npm/node_modules/which/which.js:68:16)
gyp ERR! stack at E (/usr/lib/node_modules/npm/node_modules/which/which.js:80:29)
gyp ERR! stack at /usr/lib/node_modules/npm/node_modules/which/which.js:89:16
gyp ERR! stack at /usr/lib/node_modules/npm/node_modules/which/node_modules/isexe/index.js:42:5
gyp ERR! stack at /usr/lib/node_modules/npm/node_modules/which/node_modules/isexe/mode.js:8:5
gyp ERR! stack at FSReqWrap.oncomplete (fs.js:152:21)
gyp ERR! System Linux 4.4.50
gyp ERR! command “/usr/bin/node” “/usr/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js” “configure” “–fallback-to-build” “–library=static_library” “–module=/config/node-red/node_modules/grpc/src/node/extension_binary/node-v57-linux-arm-musl/grpc_node.node” “–module_name=grpc_node” “–module_path=/config/node-red/node_modules/grpc/src/node/extension_binary/node-v57-linux-arm-musl” “–napi_version=1” “–node_abi_napi=napi”
gyp ERR! cwd /config/node-red/node_modules/grpc
gyp ERR! node -v v8.9.3
gyp ERR! node-gyp -v v3.6.2
gyp ERR! not ok
node-pre-gyp ERR! build error
node-pre-gyp ERR! stack Error: Failed to execute ‘/usr/bin/node /usr/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js configure --fallback-to-build --library=static_library --module=/config/node-red/node_modules/grpc/src/node/extension_binary/node-v57-linux-arm-musl/grpc_node.node --module_name=grpc_node --module_path=/config/node-red/node_modules/grpc/src/node/extension_binary/node-v57-linux-arm-musl --napi_version=1 --node_abi_napi=napi’ (1)
node-pre-gyp ERR! stack at ChildProcess. (/config/node-red/node_modules/grpc/node_modules/node-pre-gyp/lib/util/compile.js:83:29)
node-pre-gyp ERR! stack at emitTwo (events.js:126:13)
node-pre-gyp ERR! stack at ChildProcess.emit (events.js:214:7)
node-pre-gyp ERR! stack at maybeClose (internal/child_process.js:925:16)
node-pre-gyp ERR! stack at Process.ChildProcess._handle.onexit (internal/child_process.js:209:5)
node-pre-gyp ERR! System Linux 4.4.50
node-pre-gyp ERR! command “/usr/bin/node” “/config/node-red/node_modules/grpc/node_modules/.bin/node-pre-gyp” “install” “–fallback-to-build” “–library=static_library”
node-pre-gyp ERR! cwd /config/node-red/node_modules/grpc
node-pre-gyp ERR! node -v v8.9.3
node-pre-gyp ERR! node-pre-gyp -v v0.10.2
node-pre-gyp ERR! not ok
Failed to execute ‘/usr/bin/node /usr/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js configure --fallback-to-build --library=static_library --module=/config/node-red/node_modules/grpc/src/node/extension_binary/node-v57-linux-arm-musl/grpc_node.node --module_name=grpc_node --module_path=/config/node-red/node_modules/grpc/src/node/extension_binary/node-v57-linux-arm-musl --napi_version=1 --node_abi_napi=napi’ (1)
npm WARN [email protected] No repository field.
npm WARN [email protected] No license field.
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! [email protected] install: node-pre-gyp install --fallback-to-build --library=static_library
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the [email protected] install script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm ERR! A complete log of this run can be found in:
npm ERR! /root/.npm/_logs/2018-07-09T15_24_37_866Z-debug.log
9 Jul 15:24:38 - [warn] ------------------------------------------