EC
TS6369
TypeScriptERRORNotableConfigHIGH confidence

Option '--build' must be the first command line argument.

Production Risk

Build will fail; resolve before shipping.

What this means

A compiler configuration error (TS6369): Option '--build' must be the first command line argument.. This diagnostic is emitted by the TypeScript compiler when option '--build' must be the first command line argument..

Why it happens
  1. 1Incorrect TypeScript syntax or type usage
  2. 2Type mismatch between declared and actual value
How to reproduce

TypeScript compiler reports TS6369 during type checking.

trigger — this will error
trigger — this will error
// Triggers TS6369
// Option '--build' must be the first command line argument.

expected output

error TS6369: Option '--build' must be the first command line argument.

Fix

Fix the tsconfig.json option

WHEN When a compiler option is invalid or missing

Fix the tsconfig.json option
// tsconfig.json
{
  "compilerOptions": {
    // Review and correct the flagged option
  }
}
// Run: npx tsc --showConfig to see effective config

Why this works

TypeScript validates tsconfig.json options; check the official tsconfig reference for valid values.

Sources
Official documentation ↗

TypeScript Compiler Diagnostics

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