error TS2688: Cannot find type definition file for 'nonexistent'.
  The file is in the program because:
    Entry point of type library 'nonexistent' specified in compilerOptions


!!! error TS2688: Cannot find type definition file for 'nonexistent'.
!!! error TS2688:   The file is in the program because:
!!! error TS2688:     Entry point of type library 'nonexistent' specified in compilerOptions
==== tsconfig.json (0 errors) ====
    [{"compilerOptions": {"types": ["nonexistent"]}}]
==== index.ts (0 errors) ====
    export const x = 1;
    