Change 'ensure-directories-exist' to look for 'mkdir' in $PATH, not in /bin.

--- maxima-5.36.1/lisp-utils/defsystem.lisp.orig	2014-11-22 16:21:30.000000000 -0500
+++ maxima-5.36.1/lisp-utils/defsystem.lisp	2015-05-25 21:53:31.223648483 -0400
@@ -4627,7 +4627,7 @@
         (cmd (if (member :win32 *features*)
                  (format nil "mkdir \"~a\""
                          (coerce (subst #\\ #\/ (coerce (namestring dir) 'list)) 'string))
-                 (format nil "/bin/mkdir -p ~S" (namestring dir)))))
+                 (format nil "mkdir -p ~S" (namestring dir)))))
    (unless (directory dir)
      (lisp:system cmd))
    ;; The second return value is supposed to be T if directories were
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<tr><td><span title='2024-09-08 02:00:00 +0200'>2024-09-08</span></td><td><a href='/guix/commit/gnu/system/privilege.scm?id=0dd8e4c35109ed8bc2406a0bc13e18823a334937'>privilege: Add file-like-&gt;setuid-program helper.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/system/privilege.scm (file-like-&gt;setuid-program): New public
procedure.
* gnu/system/setuid.scm: Re-export it for compatibility.
(file-like-&gt;setuid-program): Remove this old version.
* gnu/services/docker.scm (singularity-setuid-programs): Use it (again).
* gnu/services/desktop.scm (enlightenment-privileged-programs): Likewise.

Change-Id: I8e41144438677a15cdadb3063651dbc780715497
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2024-08-11 02:00:00 +0200'>2024-08-11</span></td><td><a href='/guix/commit/gnu/system/privilege.scm?id=71f0676a295841e2cc662eec0d3e9b7e69726035'>privilege: Add POSIX capabilities(7) support.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/system/privilege.scm (&lt;privileged-program&gt;): Add a field
representing the program's POSIX capabilities.
(privileged-program-capabilities): New public procedure.
* doc/guix.texi (Privileged Programs): Document it.
* gnu/build/activation.scm (activate-privileged-programs): Take a LIBCAP
package argument providing setcap(8) to apply said capabilities.
* gnu/services.scm (privileged-program-&gt;activation-gexp): Pass said
package argument where supported.  Include privileged-program-capabilities
in the compatibility hack.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2024-08-11 02:00:00 +0200'>2024-08-11</span></td><td><a href='/guix/commit/gnu/system/privilege.scm?id=39471f2627bd63df0e9af02a46e5dda60e233ffc'>system: Add (gnu system privilege).</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/system/privilege.scm: New file.
* gnu/local.mk (GNU_SYSTEM_MODULES): Add it.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>