Fatal error on sync

[MattyRad]

Error: ENOENT: no such file or directory, open '/builds/x.md'                                                                         
    at Object.writeFileSync (node:fs:2380:20)                                                                    
    at syncOneOas                                                                                                
(file:///root/.npm/_npx/27f4e0732de9f562/node_modules/@readme/cli/src/commands/oas-sync.js:235:10)               
    at syncOas (file:///root/.npm/_npx/27f4e0732de9f562/node_modules/@readme/cli/src/commands/oas-sync.js:303:21)
    at Module.run                                                                                                
(file:///root/.npm/_npx/27f4e0732de9f562/node_modules/@readme/cli/src/commands/oas-sync.js:319:19)               
    at Command.<anonymous> (file:///root/.npm/_npx/27f4e0732de9f562/node_modules/@readme/cli/src/cli.js:100:19)  
    at async Command.parseAsync (/root/.npm/_npx/27f4e0732de9f562/node_modules/commander/lib/command.js:1104:5)  
    at async main (file:///root/.npm/_npx/27f4e0732de9f562/node_modules/@readme/cli/src/cli.js:193:3) {          
  errno: -2,                                                                                                     
  code: 'ENOENT',                                                                                                
  syscall: 'open',                                                                                               
  path: '/builds/x.md'      
}                                                                                                                

May have something to do with slashes in a spec's operation ids, but I can't say for sure.