OLL bezier error

[Andrew Bernard]

Has anybody ported the openlilylib/bezier library to work with recent 
versions of lilypond?

With 2.25 I get:
/home/acb/lib/openlilylib/bezier/_internal/special-cpts-display.ily:13:2: 
error: Guile signaled an error for the expression beginning here # (cond 
((not (defined? 'debug-control-points-line-thickness)) Syntax error: 
/home/acb/lib/openlilylib/bezier/_internal/special-cpts-display.ily:14:8: 
definition in expression context, where definitions are not allowed, in 
form (define debug-control-points-line-thickness 0.05) 
/home/acb/lib/openlilylib/bezier/_internal/special-cpts-display.ily:15:2: 
error: Guile signaled an error for the expression beginning here # (cond 
((not (defined? 'debug-control-points-cross-size)) Syntax error: 
/home/acb/lib/openlilylib/bezier/_internal/special-cpts-display.ily:16:8: 
definition in expression context, where definitions are not allowed, in 
form (define debug-control-points-cross-size 0.7) 
/home/acb/lib/openlilylib/bezier/_internal/special-cpts-display.ily:17:2: 
error: Guile signaled an error for the expression beginning here # (cond 
((not (defined? 'debug-control-points-color)) Syntax error: 
/home/acb/lib/openlilylib/bezier/_internal/special-cpts-display.ily:18:8: 
definition in expression context, where definitions are not allowed, in 
form (define debug-control-points-color red)