diff --git a/addshare/Makefile.am b/addshare/Makefile.am
index d380a296..a690cfd2 100644
--- a/addshare/Makefile.am
+++ b/addshare/Makefile.am
@@ -18,4 +18,4 @@ install-exec-hook: uninstall-hook
 	  $(LN_S) $(libexecdir)/ksmbd.tools ksmbd.addshare )
 
 uninstall-hook:
-	-rm $(DESTDIR)$(sbindir)/ksmbd.addshare
+	-rm -f "$(DESTDIR)$(sbindir)/ksmbd.addshare"
diff --git a/adduser/Makefile.am b/adduser/Makefile.am
index 861acf8b..a725c22b 100644
--- a/adduser/Makefile.am
+++ b/adduser/Makefile.am
@@ -18,4 +18,4 @@ install-exec-hook: uninstall-hook
 	  $(LN_S) $(libexecdir)/ksmbd.tools ksmbd.adduser )
 
 uninstall-hook:
-	-rm $(DESTDIR)$(sbindir)/ksmbd.adduser
+	-rm -f "$(DESTDIR)$(sbindir)/ksmbd.adduser"
diff --git a/configure.ac b/configure.ac
index de5158b7..adc2408e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -27,6 +27,21 @@ AC_PROG_SED
 AC_PROG_MKDIR_P
 AC_PROG_LN_S
 
+# Check if PKG_CHECK_VAR exists for compatibility with older (pre-version 0.28) pkg-config
+m4_ifndef([PKG_CHECK_VAR], [
+	# PKG_CHECK_VAR(VARIABLE, MODULE, CONFIG-VARIABLE,
+	# [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
+	# -------------------------------------------
+	# Retrieves the value of the pkg-config variable for the given module.
+	AC_DEFUN([PKG_CHECK_VAR],
+		[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
+		AC_ARG_VAR([$1], [value of $3 for $2, overriding pkg-config])dnl
+		_PKG_CONFIG([$1], [variable="][$3]["], [$2])
+	AS_VAR_COPY([$1], [pkg_cv_][$1])
+	AS_VAR_IF([$1], [""], [$5], [$4])dnl
+	])# PKG_CHECK_VAR
+])
+
 AC_SUBST([in_script], [[\
 '$(SED) -e "s,[@]sbindir[@],$(sbindir),g" \
         -e "s,[@]sysconfdir[@],$(sysconfdir),g" \
diff --git a/control/Makefile.am b/control/Makefile.am
index bb37b273..24a5ea46 100644
--- a/control/Makefile.am
+++ b/control/Makefile.am
@@ -18,4 +18,4 @@ install-exec-hook: uninstall-hook
 	  $(LN_S) $(libexecdir)/ksmbd.tools ksmbd.control )
 
 uninstall-hook:
-	-rm $(DESTDIR)$(sbindir)/ksmbd.control
+	-rm -f "$(DESTDIR)$(sbindir)/ksmbd.control"
diff --git a/mountd/Makefile.am b/mountd/Makefile.am
index 344d965c..d7db2ee9 100644
--- a/mountd/Makefile.am
+++ b/mountd/Makefile.am
@@ -19,4 +19,4 @@ install-exec-hook: uninstall-hook
 	  $(LN_S) $(libexecdir)/ksmbd.tools ksmbd.mountd )
 
 uninstall-hook:
-	-rm $(DESTDIR)$(sbindir)/ksmbd.mountd
+	-rm -f "$(DESTDIR)$(sbindir)/ksmbd.mountd"