/reference:file[;file2]

  jsc /reference:metad1.dll;metad2.dll /out:out.exe input.js

• Current working directory, from where the compiler is invoked.
• The common language runtime system directory.
• Directories specified by /lib.
• Directories specified by the LIB environment variable.

Here is an example for using /lib:

  jsc /lib:c:\ /reference:t2.dll t2.js

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