unable to install spgsql in 4.1.3 - required package not found

[yinso.chen@…]

The package seem to require a non-existent module called class.ss in ryanc/macros.plt/1/2

Welcome to MzScheme v4.1.3 [3m], Copyright (c) 2004-2008 PLT Scheme Inc.
> (require (planet schematics/spgsql:2:3/spgsql))
default-load-handler: cannot open input file: "/home/acct/.plt-scheme/planet/300/4.1.3/cache/ryanc/macros.plt/1/2/class.ss" (No such file or directory; errno=2)
setup-plt: error: during making for <planet>/ryanc/macros.plt/1/2/interfaces
setup-plt:   default-load-handler: cannot open input file: "/home/acct/.plt-scheme/planet/300/4.1.3/cache/ryanc/macros.plt/1/2/class.ss" (No such file or directory; errno=2)

[ryanc]

Updated ryanc/macros; should be fixed now.

(It was not actually a fatal error.)