diff --git a/build_packages b/build_packages
index 154d322d46..a07462db8e 100755
--- a/build_packages
+++ b/build_packages
@@ -166,7 +166,7 @@ fi
 # Build cros_workon packages when they are changed.
 CROS_WORKON_PKGS=()
 if [ "${FLAGS_workon}" -eq "${FLAGS_TRUE}" ]; then
-  CROS_WORKON_PKGS+=( $(cros_workon list --board=${FLAGS_board}) )
+  CROS_WORKON_PKGS+=( $("${SRC_ROOT}/scripts/cros_workon" list --board=${FLAGS_board}) )
 fi
 
 if [[ ${#CROS_WORKON_PKGS[@]} -gt 0 ]]; then
diff --git a/setup_board b/setup_board
index 1b0bf8808b..678ee3ddd0 100755
--- a/setup_board
+++ b/setup_board
@@ -98,7 +98,7 @@ generate_all_wrappers() {
   wrapper="/usr/local/bin/cros_workon-${BOARD_VARIANT}"
   sudo_clobber "${wrapper}" <<EOF
 #!/bin/bash
-exec cros_workon --board ${BOARD_VARIANT} "\$@"
+exec "${SRC_ROOT}/scripts/cros_workon" --board ${BOARD_VARIANT} "\$@"
 EOF
   wrappers+=( "${wrapper}" )
 
@@ -346,7 +346,7 @@ info "The SYSROOT is: ${BOARD_ROOT}"
 # NOTE: Printing the working-on ebuilds does not only serve the informative
 # purpose. It also causes the ${BOARD_ROOT}/etc/portage/package.* files to be
 # regenerated.
-WORKING_ON=$(cros_workon --board=${FLAGS_board} list)
+WORKING_ON=$("${SRC_ROOT}/scripts/cros_workon" --board=${FLAGS_board} list)
 if [ -n "${WORKING_ON}" ]; then
   info
   info "Currently working on the following ebuilds for this board:"
diff --git a/update_chroot b/update_chroot
index 13cb67e29b..d921cea126 100755
--- a/update_chroot
+++ b/update_chroot
@@ -231,7 +231,7 @@ fi
 
 # Build cros_workon packages when they are changed.
 if [ "${FLAGS_workon}" -eq "${FLAGS_TRUE}" ]; then
-  for pkg in $(cros_workon list --host); do
+  for pkg in $("${SRC_ROOT}/scripts/cros_workon" list --host); do
     EMERGE_FLAGS+=( "--reinstall-atoms=${pkg}" "--usepkg-exclude=${pkg}" )
   done
 fi