diff --git a/LFS/master.sh b/LFS/master.sh
index b29abf4..816ffde 100644
--- a/LFS/master.sh
+++ b/LFS/master.sh
@@ -479,7 +479,7 @@ mk_SETUP:
 
 mk_LUSER: mk_SETUP
 	@\$(call echo_SULUSER_request)
-	@( sudo \$(SU_LUSER) "source .bashrc && cd \$(MOUNT_PT)/\$(SCRIPT_ROOT) && make BREAKPOINT=\$(BREAKPOINT) LUSER" )
+	@( \$(SU_LUSER) "make -C \$(MOUNT_PT)/\$(SCRIPT_ROOT) BREAKPOINT=\$(BREAKPOINT) LUSER" )
 	@sudo make restore-luser-env
 	@touch \$@
 
diff --git a/README b/README
index d33cc83..317837a 100644
--- a/README
+++ b/README
@@ -67,9 +67,12 @@ $Id$
      If you accepted the displayed settings jhalfs will proceed to create the
      Makefile, optionally download packages.
 
-     ::NEWS::
+     IMPORTANT::
          You must be logged as a normal user with sudo privileges to run
-         the Makefile.
+         the Makefile. Furthermore, you are supposed to have enough privilege
+         to become any user. If you are not bothered about security issues,
+         the entry for the user "jhalfs_user" in /etc/sudoers could be
+         jhalfs_user ALL=(ALL) NOPASSWD:ALL
 
      NOTE::
          If you run the jhalfs script directly the only function you can select
diff --git a/common/libs/func_wrt_Makefile b/common/libs/func_wrt_Makefile
index 5ec77da..d5fff35 100644
--- a/common/libs/func_wrt_Makefile
+++ b/common/libs/func_wrt_Makefile
@@ -36,7 +36,7 @@ crLOGDIR       = /\$(SCRIPT_ROOT)/$LOGDIRBASE
 crTESTLOGDIR   = /\$(SCRIPT_ROOT)/$TESTLOGDIRBASE
 crFILELOGDIR   = /\$(SCRIPT_ROOT)/$FILELOGDIRBASE
 
-SU_LUSER       = su - \$(LUSER) -c
+SU_LUSER       = sudo -u \$(LUSER) -i sh -c
 LUSER_HOME     = \$(LHOME)/\$(LUSER)
 PRT_DU         = echo -e "\nKB: \`du -skx --exclude=\$(SCRIPT_ROOT) --exclude=lost+found \$(MOUNT_PT) \`\n"
 PRT_DU_CR      = echo -e "\nKB: \`du -skx --exclude=\$(SCRIPT_ROOT) --exclude=lost+found / \`\n"