--- a/data/Makefile.am
+++ b/data/Makefile.am
@@ -22,7 +22,7 @@
 	             echo 'if [ -z $$XDG_CURRENT_DESKTOP ]; then' && \
 	             echo '  export XDG_CURRENT_DESKTOP="GNOME-Flashback:GNOME"' && \
 	             echo 'fi' && echo '' && \
-	             echo 'exec gnome-session --session=gnome-flashback-compiz "$$@"') > $@
+	             echo 'exec @gnomeSession@/bin/gnome-session --session=gnome-flashback-compiz "$$@"') > $@
 	$(AM_V_at) chmod a+x $@
 
 gnome-flashback-metacity: Makefile
@@ -30,7 +30,7 @@
 	             echo 'if [ -z $$XDG_CURRENT_DESKTOP ]; then' && \
 	             echo '  export XDG_CURRENT_DESKTOP="GNOME-Flashback:GNOME"' && \
 	             echo 'fi' && echo '' && \
-	             echo 'exec gnome-session --session=gnome-flashback-metacity --disable-acceleration-check "$$@"') > $@
+	             echo 'exec @gnomeSession@/bin/gnome-session --session=gnome-flashback-metacity --disable-acceleration-check "$$@"') > $@
 	$(AM_V_at) chmod a+x $@
 
 CLEANFILES = \
--- a/data/xsessions/gnome-flashback-metacity.desktop.in.in
+++ b/data/xsessions/gnome-flashback-metacity.desktop.in.in
@@ -2,6 +2,6 @@
 Name=GNOME Flashback (Metacity)
 Comment=This session logs you into GNOME Flashback with Metacity
 Exec=@libexecdir@/gnome-flashback-metacity
-TryExec=metacity
+TryExec=@metacity@/bin/metacity
 Type=Application
 DesktopNames=GNOME-Flashback;GNOME;