postlight/mercury

Hi, could you help me please with passing errors and running .preview script? (PowerShell, Win10-64bit)

Martin

node ./preview https://archiweb.cz/n/domaci/v-opave-se-bude-stavet-novy-bazen-za-350-milionu-korun                                      Rebuilding Mercury
'MERCURY_TEST_BUILD' is not recognized as an internal or external command,
operable program or batch file.
child_process.js:649
    throw err;
    ^

Error: Command failed: MERCURY_TEST_BUILD=true npm run build
'MERCURY_TEST_BUILD' is not recognized as an internal or external command,
operable program or batch file.

    at checkExecSyncError (child_process.js:610:11)
    at execSync (child_process.js:646:15)
    at Object.<anonymous> (C:\app.martin\mercury-parser\mercury-parser\preview:20:3)
    at Module._compile (internal/modules/cjs/loader.js:1139:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1159:10)
    at Module.load (internal/modules/cjs/loader.js:988:32)
    at Function.Module._load (internal/modules/cjs/loader.js:896:14)
    at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:71:12)
    at internal/main/run_main_module.js:17:47 {
  status: 1,
  signal: null,
  output: [
    null,
    <Buffer >,
    <Buffer 27 4d 45 52 43 55 52 59 5f 54 45 53 54 5f 42 55 49 4c 44 27 20 69 73 20 6e 6f 74 20 72 65 63 6f 67 6e 69 7a 65 64 20 61 73 20 61 6e 20 69 6e 74 65 72 ... 59 more bytes>
  ],
  pid: 26728,
  stdout: <Buffer >,
  stderr: <Buffer 27 4d 45 52 43 55 52 59 5f 54 45 53 54 5f 42 55 49 4c 44 27 20 69 73 20 6e 6f 74 20 72 65 63 6f 67 6e 69 7a 65 64 20 61 73 20 61 6e 20 69 6e 74 65 72 ... 59 more bytes>
}