diff --git a/Cross.toml b/Cross.toml
index 871391253d3..809a24839a2 100644
--- a/Cross.toml
+++ b/Cross.toml
@@ -1,3 +1,6 @@
+[build.env]
+passthrough = ["SOURCE_DATE_EPOCH=1"]
+
 [target.x86_64-unknown-linux-gnu]
 pre-build = ["apt-get install -y cmake clang-5.0"]
 
diff --git a/Makefile b/Makefile
index fd7d45f26a0..bb0c23a8a59 100644
--- a/Makefile
+++ b/Makefile
@@ -44,6 +44,14 @@ install:
 		--profile "$(PROFILE)" \
 		$(CARGO_INSTALL_EXTRA_FLAGS)
 
+# Builds Lighthouse in a reproducible way such that two binaries for the same commit on the same
+# architecture are bit-identical. We remap the source directory to `/project/` as that is what
+# the Cross builds use.
+reproducible:
+	env SOURCE_DATE_EPOCH="1" RUSTFLAGS="--remap-path-prefix=$(CURDIR)=/project" cargo build --bin lighthouse --locked \
+		--features "$(FEATURES)" \
+		--profile "$(PROFILE)"
+
 # Builds the lcli binary in release (optimized).
 install-lcli:
 	cargo install --path lcli --force --locked \