diff --git a/eval.c b/eval.c
index d5b1876a..dfd7af28 100644
--- a/eval.c
+++ b/eval.c
@@ -1660,6 +1660,9 @@ sexp sexp_load_standard_env (sexp ctx, sexp e, sexp version) {
 #if SEXP_USE_DL
   sexp_env_define(ctx, e, sym=sexp_intern(ctx, "*shared-object-extension*", -1),
                   tmp=sexp_c_string(ctx, sexp_so_extension, -1));
+#endif
+#if SEXP_BSD
+  sexp_push(ctx, tmp, sym=sexp_intern(ctx, "bsd", -1));
 #endif
   tmp = sexp_list1(ctx, sym=sexp_intern(ctx, sexp_platform, -1));
 #if SEXP_USE_DL
diff --git a/lib/chibi/process.module b/lib/chibi/process.module
index b487ccef..3f8cd5da 100644
--- a/lib/chibi/process.module
+++ b/lib/chibi/process.module
@@ -17,7 +17,8 @@
   (cond-expand (threads (import (srfi 18))) (else #f))
   (include-shared "process")
   (cond-expand
-   (unix
+   (bsd #f)
+   (else
     (body
      (define (process-command-line pid)
        (call-with-current-continuation
@@ -36,8 +37,7 @@
                              (if (or (eof-object? ch2) (eqv? (char->integer ch2) 0))
                                  (reverse res)
                                  (lp '() res)))
-                           (lp (cons ch arg) res))))))))))))))
-   (else #f))
+                           (lp (cons ch arg) res)))))))))))))))
   (body
    (define (process-running? pid . o)
      (let ((cmdline (process-command-line pid)))
diff --git a/lib/chibi/process.stub b/lib/chibi/process.stub
index ed0db2eb..85751a4b 100644
--- a/lib/chibi/process.stub
+++ b/lib/chibi/process.stub
@@ -71,8 +71,8 @@
 (define-c int (execute execvp) (string (array string)))
 
 (cond-expand
- (unix)
- (else
-  (define-c sexp (process-command-line sexp_pid_cmdline) ((value ctx sexp) int))))
+ (bsd
+  (define-c sexp (process-command-line sexp_pid_cmdline) ((value ctx sexp) int)))
+ (else #f))
 
 (c-init "sexp_init_signals(ctx, env);")