`npm run build` throws "flow command not found"

[vinyll]

npm run build

> protonmail-export@1.1.0 build /Users/vinyll/Projects/protonmail-export
> flow && rm -Rf dist/* && babel src -d dist

sh: flow: command not found
npm ERR! file sh
npm ERR! code ELIFECYCLE
npm ERR! errno ENOENT
npm ERR! syscall spawn
npm ERR! protonmail-export@1.1.0 build: `flow && rm -Rf dist/* && babel src -d dist`
npm ERR! spawn ENOENT
npm ERR!
npm ERR! Failed at the protonmail-export@1.1.0 build 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!     /Users/vinyll/.npm/_logs/2018-04-10T00_38_31_230Z-debug.log
➜  protonmail-export git:(master) ✗ cat /Users/vinyll/.npm/_logs/2018-04-10T00_38_31_230Z-debug.log
0 info it worked if it ends with ok
1 verbose cli [ '/usr/local/Cellar/node/9.5.0/bin/node',
1 verbose cli   '/usr/local/bin/npm',
1 verbose cli   'run',
1 verbose cli   'build' ]
2 info using npm@5.6.0
3 info using node@v9.5.0
4 verbose run-script [ 'prebuild', 'build', 'postbuild' ]
5 info lifecycle protonmail-export@1.1.0~prebuild: protonmail-export@1.1.0
6 info lifecycle protonmail-export@1.1.0~build: protonmail-export@1.1.0
7 verbose lifecycle protonmail-export@1.1.0~build: unsafe-perm in lifecycle true
8 verbose lifecycle protonmail-export@1.1.0~build: PATH: /usr/local/lib/node_modules/npm/node_modules/npm-lifecycle/node-gyp-bin:/Users/vinyll/Projects/protonmail-export/node_modules/.bin:/usr/local/opt/mysql@5.6/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/MacGPG2/bin:/Development/android-sdk/platform-tools:/Development/android-sdk/tools
9 verbose lifecycle protonmail-export@1.1.0~build: CWD: /Users/vinyll/Projects/protonmail-export
10 silly lifecycle protonmail-export@1.1.0~build: Args: [ '-c', 'flow && rm -Rf dist/* && babel src -d dist' ]
11 info lifecycle protonmail-export@1.1.0~build: Failed to exec build script
12 verbose stack Error: protonmail-export@1.1.0 build: `flow && rm -Rf dist/* && babel src -d dist`
12 verbose stack spawn ENOENT
12 verbose stack     at ChildProcess.<anonymous> (/usr/local/lib/node_modules/npm/node_modules/npm-lifecycle/lib/spawn.js:48:18)
12 verbose stack     at ChildProcess.emit (events.js:160:13)
12 verbose stack     at maybeClose (internal/child_process.js:943:16)
12 verbose stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:220:5)
13 verbose pkgid protonmail-export@1.1.0
14 verbose cwd /Users/vinyll/Projects/protonmail-export
15 verbose Darwin 17.4.0
16 verbose argv "/usr/local/Cellar/node/9.5.0/bin/node" "/usr/local/bin/npm" "run" "build"
17 verbose node v9.5.0
18 verbose npm  v5.6.0
19 error file sh
20 error code ELIFECYCLE
21 error errno ENOENT
22 error syscall spawn
23 error protonmail-export@1.1.0 build: `flow && rm -Rf dist/* && babel src -d dist`
23 error spawn ENOENT
24 error Failed at the protonmail-export@1.1.0 build script.
24 error This is probably not a problem with npm. There is likely additional logging output above.
25 verbose exit [ 1, true ]

Tried npm install flow and even with a dirtier -g flag but it didn't help getting some flow binary, nor does npm install node.flow