diff --git a/docker-builder-data/build/script/common/manager.sh b/docker-builder-data/build/script/common/manager.sh
index 77afea8..327f7e5 100755
--- a/docker-builder-data/build/script/common/manager.sh
+++ b/docker-builder-data/build/script/common/manager.sh
@@ -310,8 +310,8 @@ $TC_LD_LIBRARY_PATH"
     export CFLAGS="-I$ENVDEPS_PACKET_DIR/include $TC_CFLAGS"
     export CPPFLAGS="-I$ENVDEPS_PACKET_DIR/include $TC_CPPFLAGS"
     export CXXFLAGS="-I$ENVDEPS_PACKET_DIR/include $TC_CXXFLAGS"
-    export PKG_CONFIG_PATH="$ENVDEPS_PACKET_DIR/lib/pkgconfig:$ENVDEPS_PACKET_DIR/share/pkgconfig:$TC_PKG_CONFIG_PATH"
-    export PKG_CONFIG_LIBDIR="$ENVDEPS_PACKET_DIR/lib:$TC_PKG_CONFIG_LIBDIR"
+    export PKG_CONFIG_PATH="$ENVDEPS_PACKET_DIR/lib/pkgconfig:$ENVDEPS_PACKET_DIR/lib64/pkgconfig:$ENVDEPS_PACKET_DIR/share/pkgconfig:$TC_PKG_CONFIG_PATH"
+    export PKG_CONFIG_LIBDIR="$ENVDEPS_PACKET_DIR/lib:$ENVDEPS_PACKET_DIR/lib64:$TC_PKG_CONFIG_LIBDIR"
     export PKG_CONFIG_SYSROOT_DIR="/"
     export XDG_DATA_DIRS="$ENVDEPS_PACKET_DIR/share:$TC_XDG_DATA_DIRS"
     export ACLOCAL_PATH="$ENVDEPS_PACKET_DIR/share/aclocal:$TC_ACLOCAL_PATH"
diff --git a/docker-builder-data/build/script/packet/jack-0.125.0.sh b/docker-builder-data/build/script/packet/jack-0.125.0.sh
index ae8c090..ccf5263 100644
--- a/docker-builder-data/build/script/packet/jack-0.125.0.sh
+++ b/docker-builder-data/build/script/packet/jack-0.125.0.sh
@@ -6,7 +6,3 @@ PK_URL="http://jackaudio.org/downloads/$PK_ARCHIVE"
 PK_LICENSE_FILES="AUTHORS COPYING COPYING.GPL COPYING.LGPL"
 
 source $INCLUDE_SCRIPT_DIR/inc-pkall-default.sh
-
-pkinstall_release() {
-    return 0
-}
\ No newline at end of file
diff --git a/docker-builder-data/build/script/packet/synfigcore-master.sh b/docker-builder-data/build/script/packet/synfigcore-master.sh
index 411d716..dab5764 100644
--- a/docker-builder-data/build/script/packet/synfigcore-master.sh
+++ b/docker-builder-data/build/script/packet/synfigcore-master.sh
@@ -71,10 +71,6 @@ else
     DEPS="$DEPS glibmm-2.41.4 xmlpp-2.22.0"
 fi
 
-if [ "$PLATFORM" = "linux" ]; then
-    DEPS="$DEPS jack-0.125.0"
-fi
-
 PK_DIRNAME="synfig"
 PK_URL="https://github.com/synfig/$PK_DIRNAME.git"
 PK_GIT_CHECKOUT="origin/testing"
diff --git a/docker-builder-data/build/script/packet/synfigstudio-appimage.files/launch.sh b/docker-builder-data/build/script/packet/synfigstudio-appimage.files/launch.sh
index ed5b5cd..9be2f2a 100755
--- a/docker-builder-data/build/script/packet/synfigstudio-appimage.files/launch.sh
+++ b/docker-builder-data/build/script/packet/synfigstudio-appimage.files/launch.sh
@@ -4,7 +4,7 @@ SCRIPT_DIR=$(cd `dirname "$0"`; pwd)
 BASE_DIR=`dirname "$SCRIPT_DIR"`
 
 # Check if this system have JACK installed
-if ( ! ldconfig -p | grep libjack.so >/dev/null ) || ( ! which jackd >/dev/null ) ; then
+if ! which jackd >/dev/null; then
 	# No JACK, so disable this functionality.
 	# (The bundled libjack won't work correctly anyway).
 	export SYNFIG_DISABLE_JACK=1
diff --git a/docker-builder-data/build/script/packet/synfigstudio-master.sh b/docker-builder-data/build/script/packet/synfigstudio-master.sh
index 2e435ce..64f2dc5 100644
--- a/docker-builder-data/build/script/packet/synfigstudio-master.sh
+++ b/docker-builder-data/build/script/packet/synfigstudio-master.sh
@@ -26,6 +26,10 @@ else
     DEPS="$DEPS gtkmm-3.14.0"
 fi
 
+if [ "$PLATFORM" = "linux" ]; then
+    DEPS="$DEPS jack-0.125.0"
+fi
+
 PK_DIRNAME="synfig"
 PK_URL="https://github.com/synfig/$PK_DIRNAME.git"
 PK_GIT_CHECKOUT="origin/testing"