Hi Taco Just tried to build 0.64 beta on Windows Vista but it failed. Extract of build log below. Any ideas what is causing this and what I can do to fix it? Many thanks and best wishes Graham <snip> ------ libtool: link: gcc -Wall -Wunused -Wimplicit -Wreturn-type -Wdeclaration-after-s tatement -Wno-unknown-pragmas -Wmissing-prototypes -Wmissing-declarations -g -O2 -o txt2zlib.exe txt2zlib-txt2zlib.o -lz lib/lib.a /luatexbeta/build/texk/kpath sea/.libs/libkpathsea.a c:\MinGW\bin\..\lib\gcc\mingw32\3.4.5\..\..\..\..\mingw32\bin\ld.exe: cannot find -lz collect2: ld returned 1 exit status make: *** [txt2zlib.exe] Error 1 c:\MinGW\bin\strip.exe: 'build/texk/web2c/luatex.exe': No such file ls: build/texk/web2c/luatex.exe: No such file or directory