The first example in the Learning D book, wont compile

[Ali via Digitalmars-d-learn]

Hi

The first example in the Learning D book
import core.thread;
import std.stdio;

void main() {
    import std.range: iota, range;
    write("Greeting in, ");
    foreach(num; iota(1, 4).range) {
        writef("%s...", num);
        stdout.flush();
        Thread.sleep(1.seconds);
    }
    writeln();
    writeln("Hello, World");
}


wont compile and give this error

hello.d(5): Error: module `std.range` import range not found

this should be an easy issue to fix, except that googling this 
error doesnt return anything useful