Building cli tool from source

[shepelevstas]

Hello!
In Phoenix framework Tailwindcss cli tool is automatically downloaded and used. But not working for older operation systems like MacOS Big Sur. I try to build from source but get error. Is there anywhere instruction on how to build cli tool from source? What I tried: cloning the repo and running pnpm i, but get error on postinstall script for bun:

$ pnpm i
crates/node/npm/android-arm-eabi         |  WARN  Unsupported platform: wanted: {"cpu":["arm"],"os":["android"],"libc":["any"]} (current: {"os":"darwin","cpu":"x64","libc":"unknown"})
crates/node/npm/android-arm64            |  WARN  Unsupported platform: wanted: {"cpu":["arm64"],"os":["android"],"libc":["any"]} (current: {"os":"darwin","cpu":"x64","libc":"unknown"})
crates/node/npm/darwin-arm64             |  WARN  Unsupported platform: wanted: {"cpu":["arm64"],"os":["darwin"],"libc":["any"]} (current: {"os":"darwin","cpu":"x64","libc":"unknown"})
crates/node/npm/freebsd-x64              |  WARN  Unsupported platform: wanted: {"cpu":["x64"],"os":["freebsd"],"libc":["any"]} (current: {"os":"darwin","cpu":"x64","libc":"unknown"})
crates/node/npm/linux-arm-gnueabihf      |  WARN  Unsupported platform: wanted: {"cpu":["arm"],"os":["linux"],"libc":["any"]} (current: {"os":"darwin","cpu":"x64","libc":"unknown"})
 WARN  7 other warnings
Scope: all 28 workspace projects
Downloading @oven/[email protected]: 25.38 MB/25.38 MB, done
Downloading @img/[email protected]: 8.27 MB/8.27 MB, done
Downloading [email protected]: 14.18 MB/14.18 MB, done
 WARN  1 deprecated subdependencies found: [email protected]
Packages: +626
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Downloading @oven/[email protected]: 25.38 MB/25.38 MB, done
Progress: resolved 795, reused 373, downloaded 240, added 626, done
node_modules/.pnpm/[email protected]/node_modules/bun: Running postinstall script, failed in 17.8s
.../.pnpm/[email protected]/node_modules/bun postinstall$ node install.js
│ Failed to find package "@oven/bun-darwin-x64". You may have used the "--no-optional" flag when running "npm install".
│ Failed to install package "@oven/bun-darwin-x64" using "npm install". Error: ENOENT: no such file or directory, rename '/var/…
│     at Object.renameSync (node:fs:1020:11)
│     at rename (/Users/stas/Downloads/apps/tailwindcss-4.1.17/node_modules/.pnpm/[email protected]/node_modules/bun/install.js:189:21)
│     at installBun (/Users/stas/Downloads/apps/tailwindcss-4.1.17/node_modules/.pnpm/[email protected]/node_modules/bun/install.js:451…
│     at /Users/stas/Downloads/apps/tailwindcss-4.1.17/node_modules/.pnpm/[email protected]/node_modules/bun/install.js:423:7
│     at Generator.next (<anonymous>)
│     at /Users/stas/Downloads/apps/tailwindcss-4.1.17/node_modules/.pnpm/[email protected]/node_modules/bun/install.js:41:59
│     at new Promise (<anonymous>)
│     at __async (/Users/stas/Downloads/apps/tailwindcss-4.1.17/node_modules/.pnpm/[email protected]/node_modules/bun/install.js:27:51)
│     at requireBun (/Users/stas/Downloads/apps/tailwindcss-4.1.17/node_modules/.pnpm/[email protected]/node_modules/bun/install.js:404…
│     at /Users/stas/Downloads/apps/tailwindcss-4.1.17/node_modules/.pnpm/[email protected]/node_modules/bun/install.js:395:22 {
│   errno: -2,
│   code: 'ENOENT',
│   syscall: 'rename',
│   path: '/var/folders/xm/211rhym90wbd59jmfm7q6ysm0000gn/T/bun-juoofO/node_modules/@oven/bun-darwin-x64',
│   dest: 'node_modules/@oven/bun-darwin-x64'
│ }
│ Failed to find package "@oven/bun-darwin-x64-baseline". You may have used the "--no-optional" flag when running "npm install".
│ Error: Failed to install package "bun"
│     at /Users/stas/Downloads/apps/tailwindcss-4.1.17/node_modules/.pnpm/[email protected]/node_modules/bun/install.js:399:11
│     at Generator.throw (<anonymous>)
│     at rejected (/Users/stas/Downloads/apps/tailwindcss-4.1.17/node_modules/.pnpm/[email protected]/node_modules/bun/install.js:36:27)
│     at process.processTicksAndRejections (node:internal/process/task_queues:105:5)
└─ Failed in 17.8s at /Users/stas/Downloads/apps/tailwindcss-4.1.17/node_modules/.pnpm/[email protected]/node_modules/bun

Am I doing it wrong? I could not find instructions on how to build the repo. Do I need to install Rust compiler?