id,summary,reporter,owner,description,type,status,priority,milestone,component,version,resolution,keywords,cc,difficulty 1697,R7RS cond-expand library form is broken,zaifir,,"The `r7rs` egg's support for the `(library ...)` form in `cond-expand` is broken. Running the following example {{{ (import (r7rs)) (define spiffy-installed? (cond-expand ((library (spiffy)) #t) (else #f))) }}} gives this error: {{{ Error: during expansion of (cond-expand ...) - unbound variable: ##sys#core-library-modules }}}",defect,closed,major,someday,unknown,5.2.0,fixed,,,