diff --git a/lgtm.yml b/lgtm.yml
new file mode 100644
index 0000000000..288d1a3b82
--- /dev/null
+++ b/lgtm.yml
@@ -0,0 +1,8 @@
+extraction:
+  cpp:
+    after_prepare:
+      - "pip3 install jinja2 pyyaml cython pycapnp numpy sympy tqdm cffi logentries zmq"
+      - "export PATH=$PWD/external/bin:$PATH"
+    index:
+      build_command: "python3 $(which scons)"
+