Checking if your kit is complete...
Looks good
Writing Makefile for Unicode::String
cp lib/Unicode/CharName.pm blib\lib\Unicode\CharName.pm
cp String.pm blib\lib\Unicode\String.pm
	D:\cpanrun\build\5-6-1\bin\perl.exe -Id:\cpanrun\build\5-6-1\lib -Id:\cpanrun\build\5-6-1\lib D:\cpanrun\build\5-6-1\lib\ExtUtils/xsubpp  -typemap D:\cpanrun\build\5-6-1\lib\ExtUtils\typemap String.xs > String.xsc && D:\cpanrun\build\5-6-1\bin\perl.exe -Id:\cpanrun\build\5-6-1\lib -Id:\cpanrun\build\5-6-1\lib -MExtUtils::Command -e mv String.xsc String.c
	cl -c  -nologo -O1 -MD -Zi -DNDEBUG -DWIN32 -D_CONSOLE -DNO_STRICT -DHAVE_DES_FCRYPT -DPERL_IMPLICIT_CONTEXT -DPERL_IMPLICIT_SYS -DPERL_MSVCRT_READFIX -O1 -MD -Zi -DNDEBUG    -DVERSION=\"2.09\"  -DXS_VERSION=\"2.09\"  -ID:\cpanrun\build\5-6-1\lib\CORE  String.c
String.c
String.xs(167) : warning C4761: integral size mismatch in argument; conversion supplied
String.xs(168) : warning C4761: integral size mismatch in argument; conversion supplied
String.xs(173) : warning C4761: integral size mismatch in argument; conversion supplied
String.xs(215) : warning C4761: integral size mismatch in argument; conversion supplied
String.xs(329) : warning C4761: integral size mismatch in argument; conversion supplied
String.xs(330) : warning C4761: integral size mismatch in argument; conversion supplied
"Running Mkbootstrap for Unicode::String ()"
	D:\cpanrun\build\5-6-1\bin\perl.exe -Id:\cpanrun\build\5-6-1\lib -Id:\cpanrun\build\5-6-1\lib -MExtUtils::Command -e chmod 644 String.bs
	D:\cpanrun\build\5-6-1\bin\perl.exe "-Id:\cpanrun\build\5-6-1\lib" "-Id:\cpanrun\build\5-6-1\lib" -MExtUtils::Mksymlists  -e "Mksymlists('NAME' => 'Unicode::String', 'DLBASE' => 'String', 'DL_FUNCS' => {  }, 'FUNCLIST' => [], 'IMPORTS' => {  }, 'DL_VARS' => []);"
	link -out:blib\arch\auto\Unicode\String\String.dll -dll -nologo -nodefaultlib -debug -opt:ref,icf  -libpath:"d:\cpanrun\build\5-6-1\lib\CORE"  -machine:x86 String.obj   D:\cpanrun\build\5-6-1\lib\CORE\perl56.lib oldnames.lib kernel32.lib user32.lib gdi32.lib winspool.lib  comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib  netapi32.lib uuid.lib wsock32.lib mpr.lib winmm.lib  version.lib odbc32.lib odbccp32.lib msvcrt.lib -def:String.def
   Creating library blib\arch\auto\Unicode\String\String.lib and object blib\arch\auto\Unicode\String\String.exp
	D:\cpanrun\build\5-6-1\bin\perl.exe -Id:\cpanrun\build\5-6-1\lib -Id:\cpanrun\build\5-6-1\lib -MExtUtils::Command -e chmod 755 blib\arch\auto\Unicode\String\String.dll
	D:\cpanrun\build\5-6-1\bin\perl.exe -Id:\cpanrun\build\5-6-1\lib -Id:\cpanrun\build\5-6-1\lib -MExtUtils::Command -e cp String.bs blib\arch\auto\Unicode\String\String.bs
	D:\cpanrun\build\5-6-1\bin\perl.exe -Id:\cpanrun\build\5-6-1\lib -Id:\cpanrun\build\5-6-1\lib -MExtUtils::Command -e chmod 644 blib\arch\auto\Unicode\String\String.bs
	link -out:blib\arch\auto\Unicode\String\String.dll -dll -nologo -nodefaultlib -debug -opt:ref,icf  -libpath:"d:\cpanrun\build\5-6-Using D:/cpanrun/depot/main/contrib-patched/perl/CPAN/src/Unicode-String/blib
ib oldnames.lib kernel32.lib user32.lib gdi32.lib winspool.lib  comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib  netapi32.lib uuid.lib wsock32.lib mpr.lib winmm.lib  version.lib odbc32.lib odbccp32.lib msvcrt.lib -def:String.def
   Creating library blib\arch\auto\Unicode\String\String.lib and object blib\arch\auto\Unicode\String\String.exp
	D:\cpanrun\build\5-6-1\bin\perl.exe -Id:\cpanrun\build\5-6-1\lib -Id:\cpanrun\build\5-6-1\lib -MExtUtils::Command -e chmod 755 blib\arch\auto\Unicode\String\String.dll
	D:\cpanrun\build\5-6-1\bin\perl.exe -Mblib -Id:\cpanrun\build\5-6-1\lib -Id:\cpanrun\build\5-6-1\lib -e "use Test::Harness qw(&runtests $verbose); $verbose=0; runtests @ARGV;" t\byteswap.t t\charname.t t\encoding.t t\op.t t\ord.t t\stringify.t
t\byteswap.....ok
t\charname.....ok
t\encoding.....ok
t\op...........ok
t\ord..........ok
t\stringify....ok
All tests successful.
Files=6, Tests=112,  3 wallclock secs ( 0.00 cusr +  0.00 csys =  0.00 CPU)
	link -out:blib\arch\auto\Unicode\String\String.dll -dll -nologo -nodefaultlib -debug -opt:ref,icf  -libpath:"d:\cpanrun\build\5-6-Cannot forceunlink D:\cpanrun\build\5-6-1\site\lib\auto\Unicode\String\String.dll: Permission denied at d:\cpanrun\build\5-6-1\lib/File/Find.pm line 519
NMAKE : fatal error U1077: 'D:\cpanrun\build\5-6-1\bin\perl.exe' : return code '0xff'
Stop.
inmm.lib  version.lib odbc32.lib odbccp32.lib msvcrt.lib -def:String.def
   Creating library blib\arch\auto\Unicode\String\String.lib and object blib\arch\auto\Unicode\String\String.exp
	D:\cpanrun\build\5-6-1\bin\perl.exe -Id:\cpanrun\build\5-6-1\lib -Id:\cpanrun\build\5-6-1\lib -MExtUtils::Command -e chmod 755 blib\arch\auto\Unicode\String\String.dll
Skipping D:\cpanrun\build\5-6-1\site\lib\auto\Unicode\String\String.bs (unchanged)