The instructions are similar to one given in CONTRIBUTING.md or BUILDING.md in Node.js core repo, but with the following changes:

• You have to fork https://github.com/nodejs/quic instead of https://github.com/nodejs/node
• You need to pass --experimental-quic while running ./configure

For example:

• Step 1 of setting local environment states fork https://github.com/nodejs/node on GitHub. You have to fork https://github.com/nodejs/quic instead
• Building Node.js section recommends running ./configure, you've to run ./configure --experimental-quic instead

Example commands to run coverage:

• $ git clone [email protected]:trivikr/quic.git
  $ cd quic

• On Unix/macOS:

  $ ./configure --experimental-quic --coverage
  $ make -j4 coverage

• On Windows:

  $ .\vcbuild experimental-quic coverage

EDITs:

• 2019-11-11: Added instructions for Windows as pointed out in For new contributors: here's how to build Node.js with QUIC enabled #183 (comment)

• 2020-02-17 - Due to some as yet unknown bug during build using Visual Studio Build Tools 2017, it is necessary to build on Windows using Visual Studio Build Tools 2019. See WTF? #344