diff --git a/.gitignore b/.gitignore
index 8c3524b..b172d54 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,11 +6,10 @@
 *.pyc
 *.swp
 *.swo
+/out/
 /doc/*.html
 /doc/doc.css
-/rust/Cargo.lock
-/rust/bssl-crypto/Cargo.lock
-/rust/target
+/rust/**/target
 /user.bazelrc
 
 /util/bazel-example/bazel-*
@@ -36,5 +35,3 @@
 /util/bot/tools
 /util/bot/windows_sdk
 
-# Ignore target under any directory.
-target/
diff --git a/rust/bssl-crypto/Cargo.lock b/rust/bssl-crypto/Cargo.lock
new file mode 100644
index 0000000..d1c658f
--- /dev/null
+++ b/rust/bssl-crypto/Cargo.lock
@@ -0,0 +1,14 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
+[[package]]
+name = "bssl-crypto"
+version = "0.2.0"
+dependencies = [
+ "bssl-sys",
+]
+
+[[package]]
+name = "bssl-sys"
+version = "0.1.0"
diff --git a/rust/bssl-sys/Cargo.lock b/rust/bssl-sys/Cargo.lock
new file mode 100644
index 0000000..24f17f4
--- /dev/null
+++ b/rust/bssl-sys/Cargo.lock
@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
+[[package]]
+name = "bssl-sys"
+version = "0.1.0"