1 files changed, 20 insertions, 17 deletions
diff --git a/tex/context/base/mkiv/l-os.lua b/tex/context/base/mkiv/l-os.lua
index 06cc35a79..b46036757 100644
--- a/tex/context/base/mkiv/l-os.lua
+++ b/tex/context/base/mkiv/l-os.lua
@@ -183,11 +183,30 @@ end
 
 -- end of environment hack
 
+if not io.fileseparator then
+    if find(os.getenv("PATH"),";",1,true) then
+        io.fileseparator, io.pathseparator, os.type = "\\", ";", os.type or "windows"
+    else
+        io.fileseparator, io.pathseparator, os.type = "/" , ":", os.type or "unix"
+    end
+end
+
+os.type = os.type or (io.pathseparator == ";"       and "windows") or "unix"
+os.name = os.name or (os.type          == "windows" and "mswin"  ) or "linux"
+
+if os.type == "windows" then
+    os.libsuffix, os.binsuffix, os.binsuffixes = 'dll', 'exe', { 'exe', 'cmd', 'bat' }
+else
+    os.libsuffix, os.binsuffix, os.binsuffixes = 'so', '', { '' }
+end
+
 local execute = os.execute
 local iopopen = io.popen
+local ostype  = os.type
 
 local function resultof(command)
-    local handle = iopopen(command,"rb") -- already has flush, b is new !
+    -- already has flush, b is new and we need it to pipe xz output
+    local handle = iopopen(command,ostype == "windows" and "rb" or "r")
     if handle then
         local result = handle:read("*all") or ""
         handle:close()
@@ -203,22 +222,6 @@ function os.pipeto(command)
     return iopopen(command,"w") -- already has flush
 end
 
-if not io.fileseparator then
-    if find(os.getenv("PATH"),";",1,true) then
-        io.fileseparator, io.pathseparator, os.type = "\\", ";", os.type or "windows"
-    else
-        io.fileseparator, io.pathseparator, os.type = "/" , ":", os.type or "unix"
-    end
-end
-
-os.type = os.type or (io.pathseparator == ";"       and "windows") or "unix"
-os.name = os.name or (os.type          == "windows" and "mswin"  ) or "linux"
-
-if os.type == "windows" then
-    os.libsuffix, os.binsuffix, os.binsuffixes = 'dll', 'exe', { 'exe', 'cmd', 'bat' }
-else
-    os.libsuffix, os.binsuffix, os.binsuffixes = 'so', '', { '' }
-end
 
 local launchers = {
     windows = "start %s",