Error: undefined identifier executeShell

[Gary Willoughby]

Using Debian7, gcc-4.8, gdc-4.8 from the `testing main` debian 
source.

	import std.stdio;
	import std.process;

	void main()
	{
		string x = executeShell("uname").output;
		writefln(x);
	}

$ gdc test.d -o test

test.d:6: Error: undefined identifier executeShell
/usr/include/d/4.8/std/range.d:611: Error: static assert  "Cannot 
put a char[] into a Appender!(string)"
/usr/include/d/4.8/std/format.d:1440:        instantiated from 
here: put!(Appender!(string), char[])
/usr/include/d/4.8/std/format.d:1342:        instantiated from 
here: formatUnsigned!(Appender!(string), char)
/usr/include/d/4.8/std/format.d:1316:        instantiated from 
here: formatIntegral!(Appender!(string), ulong, char)
/usr/include/d/4.8/std/conv.d:100:        ... (7 instantiations, 
-v to show) ...
/usr/include/d/4.8/std/stdio.d:1827:        instantiated from 
here: writefln!(char, )
test.d:7:        instantiated from here: writefln!(string)