diff --git a/macros.sysusers b/macros.sysusers
index d96156c..394c4af 100644
--- a/macros.sysusers
+++ b/macros.sysusers
@@ -7,7 +7,12 @@
 #
 # add %sysusers_requires in the package section
 #
-# add "%sysusers_generate_pre <source file> <account>" to build section
+# add "%sysusers_generate_pre <source file> <account> [<config>]" to build section
+#
+## <source file> is the source file as defined in the spec file header
+## <account> is just a random name, th output file will be "<account>.pre"
+## <config> is the name of the configuration file as stored in
+##          /usr/lib/sysusers.d/<config>
 #
 # add "%pre -f <account>.pre" to spec file
 #
@@ -16,4 +21,4 @@
 %sysusers_requires	Requires(pre): sysuser-shadow
 
 %sysusers_generate_pre()	\
-%{_prefix}/lib/rpm/sysusers-generate-pre  "%1" > "%2".pre
+%{_prefix}/lib/rpm/sysusers-generate-pre  "%1" "%3" > "%2".pre
diff --git a/sysuser-tools.changes b/sysuser-tools.changes
index 6ec3470..9bae581 100644
--- a/sysuser-tools.changes
+++ b/sysuser-tools.changes
@@ -1,3 +1,13 @@
+-------------------------------------------------------------------
+Fri Jan 29 13:36:08 UTC 2021 - Thorsten Kukuk <kukuk@suse.com>
+
+- Use systemd-sysusers only if /proc is mounted, don't require it
+
+-------------------------------------------------------------------
+Wed Jan 27 13:02:13 UTC 2021 - Thorsten Kukuk <kukuk@suse.com>
+
+- Set --replace option for systemd-sysusers
+
 -------------------------------------------------------------------
 Wed Jan 20 15:06:51 UTC 2021 - Thorsten Kukuk <kukuk@suse.com>
 
diff --git a/sysuser-tools.spec b/sysuser-tools.spec
index 0a9f429..a8505a0 100644
--- a/sysuser-tools.spec
+++ b/sysuser-tools.spec
@@ -38,7 +38,7 @@ Generate auto provides for system users.
 %package -n sysuser-shadow
 Summary:        Tool to execute sysusers.d with shadow utilities
 Group:          System/Packages
-Requires(pre):  (/usr/sbin/useradd or busybox or /usr/bin/systemd-sysusers)
+Requires(pre):  (/usr/sbin/useradd or busybox)
 # prefer original shadow over busybox by default
 Suggests:       shadow
 
diff --git a/sysusers-generate-pre b/sysusers-generate-pre
index 4cc2620..9d6897e 100644
--- a/sysusers-generate-pre
+++ b/sysusers-generate-pre
@@ -1,6 +1,6 @@
 #!/bin/sh
 # pass systemd sysusers config paths as argument to this script.
 
-echo '/usr/sbin/sysusers2shadow <<"EOF" || [ -f /.buildenv ]'
+echo "/usr/sbin/sysusers2shadow $3 <<\"EOF\" || [ -f /.buildenv ]"
 grep -he '^[ugmr]' "$@"
 echo 'EOF'
diff --git a/sysusers2shadow.sh b/sysusers2shadow.sh
index 08a7209..ebb9d50 100644
--- a/sysusers2shadow.sh
+++ b/sysusers2shadow.sh
@@ -7,10 +7,11 @@ run() {
 	"$@"
 }
 
-if [ -x /usr/bin/systemd-sysusers ]; then
+if [ -x /usr/bin/systemd-sysusers ] && [ -e /proc/version ]; then
 
+    test -n "$1" && REPLACE_ARG="--replace=/usr/lib/sysusers.d/$1" ||:
     # Use systemd-sysusers and let it read the input directly from stdin
-    /usr/bin/systemd-sysusers -
+    /usr/bin/systemd-sysusers $REPLACE_ARG -
     # We need to clear the nscd cache, as systemd-sysusers could have
     # triggered a negative cache entry
     if [ -x /usr/sbin/nscd ]; then
@@ -29,7 +30,7 @@ else
 	eval set -- $LINE
 	case "${1-}" in
 	    \#*|"")
-	    ;;
+	        ;;
 	    g)
 		shift
 		ARGUMENTS="$1"