%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% UGH UGH UGH UGHUGH FIXME
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% -> duplication!
-breve = \duration #'( -1 0)
-longa = \duration #'( -2 0 )
-maxima = \duration #'( -3 0 )
+breve = \duration #(make-duration -1 0)
+longa = \duration #'(make-duration -2 0 )
+maxima = \duration #'(make-duration -3 0 )
+
#(begin
(eval-string (ly-gulp-file "slur.scm"))