=> Bootstrap dependency digest>=20010302: found digest-20121220
=> Checksum SHA1 OK for nfdump-1.6.6.tar.gz
=> Checksum RMD160 OK for nfdump-1.6.6.tar.gz
===> Installing dependencies for nfdump-1.6.6nb5
==========================================================================
The supported build options for nfdump are:

	nfdump-ftconv nfdump-nfprofile nfdump-sflow

You can select which build options to use by setting PKG_DEFAULT_OPTIONS
or the following variable.  Its current value is shown:

	PKG_OPTIONS.nfdump (not defined)

==========================================================================
===> Overriding tools for nfdump-1.6.6nb5
===> Extracting for nfdump-1.6.6nb5
===> Patching for nfdump-1.6.6nb5
=> Applying pkgsrc patches for nfdump-1.6.6nb5
===> Creating toolchain wrappers for nfdump-1.6.6nb5
===> Configuring for nfdump-1.6.6nb5
=> Modifying GNU configure scripts to avoid --recheck
=> Replacing config-guess with pkgsrc versions
=> Replacing config-sub with pkgsrc versions
=> Replacing install-sh with pkgsrc version
checking for a BSD-compatible install... /usr/bin/install -c -o root -g operator
checking whether build environment is sane... yes
checking for a thread-safe mkdir -p... ./install-sh -c -d
checking for gawk... /usr/bin/awk
checking whether make sets $(MAKE)... yes
checking for i386-pc-minix-gcc... gcc
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking for suffix of executables... 
checking whether we are cross compiling... no
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether gcc accepts -g... yes
checking for gcc option to accept ISO C89... none needed
checking for style of include used by make... GNU
checking dependency style of gcc... gcc3
checking whether gcc and cc understand -c and -o together... yes
checking whether we are using SunPro C... no
checking for bison... /usr/bin/yacc
checking for flex... /usr/bin/lex
checking lex output file root... lex.yy
checking lex library... -lfl
checking whether yytext is a pointer... yes
configure: error: No lex or flex found on system
*** Error code 1

Stop.
bmake: stopped in /usr/pkgsrc/net/nfdump
*** Error code 1

Stop.
bmake: stopped in /usr/pkgsrc/net/nfdump