--- a/cephes.asd
+++ b/cephes.asd
@@ -5,7 +5,7 @@
 (defclass makefile (source-file) ((type :initform "m")))
 (defmethod perform ((o load-op) (c makefile)) t)
 (defmethod perform ((o compile-op) (c makefile))
-  (let* ((lib-dir (system-relative-pathname "cephes" "scipy-cephes"))
+  (let* ((lib-dir #P"@out@/scipy-cephes")
          (lib (make-pathname :directory `(:relative ,(namestring lib-dir))
                              :name "libmd"
                              :type #+darwin "dylib" #+(and unix (not darwin)) "so" #+(or windows win32) "dll"))
@@ -14,7 +14,7 @@
 	(format *error-output* "Library ~S exists, skipping build" lib)
 	(format *error-output* "Building ~S~%" lib))
     (unless built
-      (chdir (native-namestring lib-dir))
+      (chdir "scipy-cephes")
       (run-program "make" :output t))))
 
 (defsystem "cephes"

Diff finished.  Thu Mar 28 08:13:30 2024