> make
rm -rf build/
mkdir build
perl -Ilib bin/book-to-latex --paper a4 src/preface.pod src/basics.pod src/operators.pod src/subs-n-sigs.pod src/classes-and-objects.pod src/multi-dispatch.pod src/roles.pod src/subtypes.pod src/regexes.pod src/grammars.pod src/builtins.pod > build/UsingPerl6.a4.tex
Use of uninitialized value in concatenation (.) or string at /home/tadzik/.perl5/lib/perl5/Pod/PseudoPod/LaTeX.pm line 214.
Use of uninitialized value in concatenation (.) or string at /home/tadzik/.perl5/lib/perl5/Pod/PseudoPod/LaTeX.pm line 214.
cd build && make -I ../lib -f ../lib/Makefile 
NOTE: You may ignore warnings about the following files:

     UsingPerl6.a4.d

make[1]: Entering directory `/home/tadzik/src/book/build'
../lib/Makefile:2262: UsingPerl6.a4.d: No such file or directory
make[1]: warning: jobserver unavailable: using -j1.  Add `+' to parent make rule.
= UsingPerl6.a4.tex --> UsingPerl6.a4.d UsingPerl6.a4.pdf.1st.make (0-1) =
make[1]: *** [UsingPerl6.a4.d] Error 1
make[1]: Leaving directory `/home/tadzik/src/book/build'
make: *** [pdf] Error 2