diff --git a/pipewire-v4l2/src/pw-v4l2.in b/pipewire-v4l2/src/pw-v4l2.in
index a383ba230..248d9ee60 100755
--- a/pipewire-v4l2/src/pw-v4l2.in
+++ b/pipewire-v4l2/src/pw-v4l2.in
@@ -54,10 +54,16 @@ done
 
 shift $(( OPTIND - 1 ))
 
-if [ "$LD_PRELOAD" = "" ] ; then
-   LD_PRELOAD='@LIBV4L2_PATH@/libpw-v4l2.so'
+if [ "$PW_UNINSTALLED" = 1 ] ; then
+   PW_V4L2_LD_PRELOAD="$PW_BUILDDIR"'/pipewire-v4l2/src/libpw-v4l2.so'
 else
-   LD_PRELOAD="$LD_PRELOAD "'@LIBV4L2_PATH@/libpw-v4l2.so'
+   PW_V4L2_LD_PRELOAD='@LIBV4L2_PATH@/libpw-v4l2.so'
+fi
+
+if [ "$LD_PRELOAD" = "" ] ; then
+   LD_PRELOAD="$PW_V4L2_LD_PRELOAD"
+else
+   LD_PRELOAD="$LD_PRELOAD $PW_V4L2_LD_PRELOAD"
 fi
 
 export LD_PRELOAD
diff --git a/pw-uninstalled.sh b/pw-uninstalled.sh
index 7bc948ddd..1bb6c55c2 100755
--- a/pw-uninstalled.sh
+++ b/pw-uninstalled.sh
@@ -41,7 +41,7 @@ export SPA_PLUGIN_DIR="${BUILDDIR}/spa/plugins"
 export SPA_DATA_DIR="${SCRIPT_DIR}/spa/plugins"
 # the directory with pipewire modules
 export PIPEWIRE_MODULE_DIR="${BUILDDIR}/src/modules"
-export PATH="${BUILDDIR}/src/daemon:${BUILDDIR}/src/tools:${BUILDDIR}/src/media-session:${BUILDDIR}/src/examples:${PATH}"
+export PATH="${BUILDDIR}/src/daemon:${BUILDDIR}/src/tools:${BUILDDIR}/src/media-session:${BUILDDIR}/src/examples:${BUILDDIR}/pipewire-v4l2/src:${PATH}"
 export LD_LIBRARY_PATH="${BUILDDIR}/src/pipewire/:${BUILDDIR}/pipewire-jack/src/${LD_LIBRARY_PATH+":$LD_LIBRARY_PATH"}"
 export GST_PLUGIN_PATH="${BUILDDIR}/src/gst/${GST_PLUGIN_PATH+":${GST_PLUGIN_PATH}"}"
 # the directory with card profiles and paths
@@ -50,6 +50,7 @@ export ACP_PROFILES_DIR="${SCRIPT_DIR}/spa/plugins/alsa/mixer/profile-sets"
 # ALSA plugin directory
 export ALSA_PLUGIN_DIR="${BUILDDIR}/pipewire-alsa/alsa-plugins"
 
+export PW_BUILDDIR=$BUILDDIR
 export PW_UNINSTALLED=1
 export PKG_CONFIG_PATH="${BUILDDIR}/meson-uninstalled/:${PKG_CONFIG_PATH}"