clsql-mysql for CLSQL 4.1.1 doesn't compile

Linux Ubuntu 9.04
MySQL Ver 14.12 Distrib 5.0.83
SBCL 1.0.30
CLSQL 4.1.1 (fresh from asdf-install)

Compiling clsql-mysql (during (asdf-install:install :clsql)) gives

error opening #P"/usr/local/lib/sbcl/site-systems/clsql-mysql.asd":
  Too many open files
   [Condition of type SB-INT:SIMPLE-FILE-ERROR]


after many many lines of

; loading system definition from
; /usr/local/lib/sbcl/site-systems/clsql-mysql.asd into #<PACKAGE "ASDF0">
; loading system definition from
; /usr/local/lib/sbcl/site-systems/clsql-mysql.asd into #<PACKAGE "ASDF1">
; loading system definition from
; /usr/local/lib/sbcl/site-systems/clsql-mysql.asd into #<PACKAGE "ASDF2">
[...]

up to ASDF1017.  I tried compiling CLSQL 4.0.5 again after that, which
worked flawlessly.  How can I get around this to get to use the latest
CLSQL version?

I look forward to trying it out on MySQL 5.1 also, I've had to keep 5.0
around just for CLSQL. :)

Thanks,

Bjorn.