Currently it is not possible to set a reference to an environment variable in the Java Options when using the installer. For instance, if the following is set:

-Dfisheye.inst=%FISHEYE_INST%

Then FishEye won't read the value of this variable (if you check under System Info in FishEye Administration, the value will be shown as %FISHEYE_INST%).

P.S.: the installer picks references set in environment variables properly during the install, for example, if the following environment variable is set:

FECRU=C:\fecru-3.2.4\lib\svn\svnkit-javahl16-1.7.11

And the following:

FISHEYE_LIBRARY_PATH=%FECRU%

When FishEye is installed, it will put the following value in the Java Options:

-Dfisheye.library.path=C:\fecru-3.2.4\lib\svn\svnkit-javahl16-1.7.11