(if (version>=? "4.7.3.0" (chicken-version))
    (compile
     -fixnum-arithmetic
     -disable-interrupts              ;we manipulate system structures
     -no-procedure-checks             ;we do explicit checks
     -no-bound-checks                 ;we manipulate unbound variables
     -O2 -d1
     -o environments.so               ;we need to put the binary in
                                      ;the root directory for the
                                      ;install-extension step
     -s legacy/environments.scm -j environments)
    (compile -O2 -d0 -s environments.scm -J))

(compile -O3 -d0 -s environments.import.scm)

(install-extension
 'environments
 `("environments.so" "environments.import.so")
 `((version "2.0.0")))