[racket] Errors trying to compile Racket 5.1.1 on Linux (Ubuntu 10.04 LTS)

### I do:
cd racket-5.1.1/src
mkdir build
cd build
../configure
make

### and I see:

make 3m
make[1]: Entering directory '/home/kfrost/racket-5.1.1/src/build'
cd racket; make 3m
/bin/sh: line 0: cd: racket: No such file or directory
make[2[: Entering directory '/home/kfrost/racket-5.1.1/src/build'
cd racket; make 3m
/bin/sh: line 0: cd: racket: No such file or directory

### Repeated over 1000 times (with the int next to make incremented
each time)...
### Ending with a stack of Error 2 messages.

# Has anyone else seen this?  What's wrong?
# Thanks.