/**
 * Build a child environment whose executable search path is `dir` followed by
 * the inherited path, with exactly one path-like key on Windows.
 *
 * Windows environment variables are case-insensitive but JavaScript object
 * keys are not. A parent typically spells the variable `Path`; spreading
 * `process.env` and then assigning `PATH` produces an object with BOTH keys,
 * and which one the child's environment block keeps is undefined - in the
 * field the AFT worker lost the inherited path and could not resolve `git`,
 * `pwsh`, or `bash` by name (#298). So on `win32` every case-variant is
 * removed and one key is written back under the inherited spelling (`PATH`
 * only when nothing was inherited). On other platforms `Path` and `path` are
 * distinct variables and are left alone; only the exact `PATH` is edited.
 *
 * With no `dir` the call is a pure normalization. The input is not mutated.
 */
export declare function withPathPrepended(env: NodeJS.ProcessEnv, dir?: string | null, platform?: NodeJS.Platform): NodeJS.ProcessEnv;
//# sourceMappingURL=path-env.d.ts.map