diff -uNr pam_mount-2.15_old/src/mtcrypt.c pam_mount-2.15/src/mtcrypt.c
--- pam_mount-2.15_old/src/mtcrypt.c	2015-07-04 16:00:12.917943336 +0200
+++ pam_mount-2.15/src/mtcrypt.c	2015-07-04 16:03:45.685302493 +0200
@@ -534,7 +534,7 @@
 
 	/* candidate for replacement by some libmount calls, I guess. */
 	argk = 0;
-	mount_args[argk++] = "mount";
+	mount_args[argk++] = "@@NIX_UTILLINUX@@/mount";
 	if (opt->fstype != NULL) {
 		mount_args[argk++] = "-t";
 		mount_args[argk++] = opt->fstype;
@@ -668,7 +668,7 @@
 
 	if (!opt->no_update)
 		pmt_smtab_remove(mntpt, SMTABF_MOUNTPOINT);
-	rmt_args[argk++] = "mount";
+	rmt_args[argk++] = "@@NIX_UTILLINUX@@/mount";
 	rmt_args[argk++] = "-o";
 	rmt_args[argk++] = opt->extra_opts;
 	rmt_args[argk++] = mntpt;
@@ -749,7 +749,7 @@
 		pmt_smtab_remove(mountpoint, SMTABF_MOUNTPOINT);
 	pmt_cmtab_remove(mountpoint);
 
-	umount_args[argk++] = "umount";
+	umount_args[argk++] = "@@NIX_UTILLINUX@@/umount";
 	umount_args[argk++] = "-i";
 	umount_args[argk++] = mountpoint;
 	umount_args[argk]   = NULL;