=> Bootstrap dependency digest>=20010302: found digest-20121220
=> Checksum SHA1 OK for yacas-1.2.2.tar.gz
=> Checksum RMD160 OK for yacas-1.2.2.tar.gz
===> Installing dependencies for yacas-1.2.2nb1
=> Tool dependency gmake>=3.81: found gmake-3.82nb6
=> Tool dependency perl>=5.0: found perl-5.16.3
=> Build dependency x11-links>=0.72: found x11-links-0.74
=> Full dependency gsl>=1.5nb1: found gsl-1.15
=> Full dependency x11>=6.8.2: found x11-6.8.2
===> Overriding tools for yacas-1.2.2nb1
===> Extracting for yacas-1.2.2nb1
===> Patching for yacas-1.2.2nb1
=> Substituting "d2u" in src/cyacas.h src/cyacas.cpp plugins/pcre/pcre_config.h
WARNING: [subst.mk:d2u] Ignoring non-existent file "./src/cyacas.h".
WARNING: [subst.mk:d2u] Ignoring non-existent file "./src/cyacas.cpp".
WARNING: [subst.mk:d2u] Ignoring non-existent file "./plugins/pcre/pcre_config.h".
=> Applying pkgsrc patches for yacas-1.2.2nb1
===> Creating toolchain wrappers for yacas-1.2.2nb1
ERROR: fontconfig>=2.4.2 is not installed; can't buildlink files.
*** Error code 1

Stop.
bmake: stopped in /usr/pkgsrc/math/yacas
*** Error code 1

Stop.
bmake: stopped in /usr/pkgsrc/math/yacas