diff --git a/cross/diesel/Makefile b/cross/diesel/Makefile
index 148d383f9d6..ed8bbbe20b4 100644
--- a/cross/diesel/Makefile
+++ b/cross/diesel/Makefile
@@ -25,8 +25,8 @@ CARGO_BUILD_ARGS += --features=mysql
 # do not read settings from bin/mysql_conf
 export "MYSQL_DB_SOCKET=/run/mysqld/mysqld10.sock"
 
-# mysqlclient-sys: to find libmysqlclient
-ENV += MYSQLCLIENT_LIB_DIR=$(STAGING_INSTALL_PREFIX)/lib
+# let ./configure find mysql_config (it is a script and works for cross compile)
+ENV += "PATH=$(PATH):$(STAGING_INSTALL_PREFIX)/bin"
 # to find dependencies of libmysqlclient (libz)
 ENV += RUSTFLAGS="-Clink-arg=-Wl,--rpath,$(INSTALL_PREFIX)/lib -Clink-arg=-Wl,--rpath-link,$(STAGING_INSTALL_PREFIX)/lib"
 
diff --git a/cross/syncstorage-rs/Makefile b/cross/syncstorage-rs/Makefile
index 2b751a5eed7..751cb697345 100644
--- a/cross/syncstorage-rs/Makefile
+++ b/cross/syncstorage-rs/Makefile
@@ -1,5 +1,5 @@
 PKG_NAME = syncstorage-rs
-PKG_VERS = 0.17.3
+PKG_VERS = 0.17.15
 PKG_EXT = tar.gz
 PKG_DIST_NAME = $(PKG_NAME)-$(PKG_VERS).$(PKG_EXT)
 PKG_DIST_SITE = https://github.com/mozilla-services/$(PKG_NAME)/archive/${PKG_VERS}
diff --git a/cross/syncstorage-rs/digests b/cross/syncstorage-rs/digests
index 0962a0ac239..9a24b52d4b8 100644
--- a/cross/syncstorage-rs/digests
+++ b/cross/syncstorage-rs/digests
@@ -1,3 +1,3 @@
-syncstorage-rs-0.17.3.tar.gz SHA1 e6da28070110db3ca84288944ba7a91724c594f8
-syncstorage-rs-0.17.3.tar.gz SHA256 ebf25922bca64d6a0acfc25a8aee400cd0ac0f39ebe1315251fe67a59ff20964
-syncstorage-rs-0.17.3.tar.gz MD5 2954ee9715062ea1ca8bc3f56dcb46af
+syncstorage-rs-0.17.15.tar.gz SHA1 8ad56f7cf5d26bfcb8f02160bb420ea815e614cb
+syncstorage-rs-0.17.15.tar.gz SHA256 eee17d5b69b59415d83bf3957e3f92da1a4eb0e443e74c39ecac9292be00943f
+syncstorage-rs-0.17.15.tar.gz MD5 f1b5a9a54a54d0aefcc9dd472e3a7143
diff --git a/spk/ffsync/Makefile b/spk/ffsync/Makefile
index c8649b4b1c7..4dad458788b 100644
--- a/spk/ffsync/Makefile
+++ b/spk/ffsync/Makefile
@@ -1,6 +1,6 @@
 SPK_NAME = ffsync
-SPK_VERS = 0.17.3
-SPK_REV = 2
+SPK_VERS = 0.17.15
+SPK_REV = 3
 SPK_ICON = src/ffsync.png
 
 DEPENDS = cross/syncstorage-rs cross/diesel
@@ -16,7 +16,7 @@ SPK_DEPENDS = MariaDB10:$(PYTHON_PACKAGE)
 MAINTAINER = SynoCommunity
 DESCRIPTION = An implementation of the Mozilla Sync-1.5 Server protocol used by the sync service in Firefox 29 and later. You can use Mozilla Sync Server to exchange browser data \(bookmarks, history, open tabs, passwords, add-ons, and the like\) between \'clients\' in a manner that respects a user\'s security and privacy. The service runs on port 8132.
 DISPLAY_NAME = Mozilla Sync Server
-CHANGELOG = "Update Mozilla Sync Server package to v0.17.3."
+CHANGELOG = "Update Mozilla Sync Server package to v0.17.15."
 
 HOMEPAGE = https://mozilla-services.readthedocs.io/en/latest/howtos/run-sync-1.5.html
 LICENSE = MPL 2.0