--- texmf-dist/tex/latex/ifplatform/ifplatform.sty	2009-09-10 19:47:34.000000000 -0400
+++ texmf-dist/tex/latex/ifplatform/ifplatform.sty.new	2011-05-18 10:45:03.594630489 -0400
@@ -10,7 +10,7 @@
 %%   License information appended.
 \ProvidesPackage{ifplatform}
   [2009/09/10 v0.3a  Testing for the operating system]
-\RequirePackage{pdftexcmds,catchfile}
+\RequirePackage{pdftexcmds,catchfile,ifluatex}
 \newif\ifshellescape
 \newif\ifwindows
 \newif\ifmacosx
@@ -27,10 +27,12 @@
 \ifnum\pdf@shellescape=1\relax
   \shellescapetrue
 \else
+  \ifluatex\else
   \PackageWarningNoLine{ifplatform}{^^J \space\space\space
     shell escape is disabled,
     so I can only detect \@backslashchar ifwindows%
   }
+  \fi
 \fi
 \def\ip@cantdecide{%
   \PackageWarningNoLine{ifplatform}{^^J \space\space\space
@@ -38,6 +40,15 @@
     you appear to be both%
   }%
 }
+\ifluatex
+  \csname\directlua{
+      if os.type == "unix" then
+        tex.sprint("@ip@nix@true")
+      elseif os.type == "windows" then
+        tex.sprint("windowstrue")
+      end
+    }\endcsname
+\else
 \IfFileExists{nul:}{\@ip@nix@false}{\@ip@nix@true}
 \IfFileExists{/dev/null}{\windowsfalse}{\windowstrue}
 \edef\ip@windows@echo@test{echo \string# > "\ip@file"}
@@ -73,6 +84,7 @@
     \fi
   \fi
 \fi
+\fi
 \def\ip@only@six#1#2#3#4#5#6#7\@nil{#1#2#3#4#5#6}
 \if@ip@nix@
 \ifshellescape