diff --git a/scripts/build_isar.sh b/scripts/build_isar.sh
index 1934bd179..657c7b677 100755
--- a/scripts/build_isar.sh
+++ b/scripts/build_isar.sh
@@ -1,3 +1,7 @@
+# TODO: add `rustup@1.25.2` to `srclibs``
+# TODO: verify is `gcc-multilib` or `libc-dev` is needed
+$$rustup$$/rustup-init.sh -y
+source $HOME/.cargo/env
 cd thirdparty/isar/
 bash tool/build_android.sh x86
 bash tool/build_android.sh x64