diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 069b8ae06..8fd89f2f8 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -170,8 +170,9 @@ jobs:
           chmod +x install.sh
           ./install.sh --user
           echo $HOME/bin >> $GITHUB_PATH
-      - run: cargo vendor --versioned-dirs --locked
-        working-directory: third-party
+      - run: bazel run //third-party:vendor
+      - name: Check third-party/bazel up to date.
+        run: git diff --exit-code
       - run: bazel run //demo:autocxx-demo --verbose_failures --noshow_progress
 
   sanitizer:
diff --git a/BUILD b/BUILD
index fce8c291c..af93f64fc 100644
--- a/BUILD
+++ b/BUILD
@@ -1,19 +1,28 @@
 load("@rules_rust//rust:defs.bzl", "rust_library", "rust_proc_macro", "rust_binary")
+load("//third-party/bazel:defs.bzl", "all_crate_deps")
+
+# export files to referenced by third-party/BUILD.
+exports_files([
+    "Cargo.toml",
+    "Cargo.lock",
+    "engine/Cargo.toml",
+    "gen/build/Cargo.toml",
+    "gen/cmd/Cargo.toml",
+    "integration-tests/Cargo.toml",
+    "macro/Cargo.toml",
+    "parser/Cargo.toml",
+    "tools/mdbook-preprocessor/Cargo.toml",
+    "tools/reduce/Cargo.toml",
+])
 
 rust_library(
     name = "autocxx",
     edition = "2021",
     srcs = glob(["src/**/*.rs"]),
-    data = glob(["README.md"]),
-    deps = [
-        "//third-party:cxx",
-        "//third-party:moveit",
-    ],
+    compile_data = glob(["README.md"]),
+    deps = all_crate_deps(normal = True),
     visibility = ["//visibility:public"],
-    proc_macro_deps = [
-	":autocxx-macro",
-        "//third-party:aquamarine",
-    ],
+    proc_macro_deps = all_crate_deps(proc_macro = True) + [":autocxx-macro"],
 )
 
 rust_proc_macro(
@@ -21,66 +30,24 @@ rust_proc_macro(
     srcs = glob(["macro/src/**/*.rs"]),
     edition = "2021",
     visibility = ["//visibility:public"],
-    deps = [
-	":autocxx-parser",
-        "//third-party:proc-macro-error",
-        "//third-party:proc-macro2",
-        "//third-party:quote",
-        "//third-party:syn",
-    ],
+    deps = all_crate_deps(normal = True, package_name = "macro") + [":autocxx-parser"],
 )
 
 rust_library(
     name = "autocxx-parser",
     srcs = glob(["parser/src/**/*.rs"]),
     edition = "2021",
-    deps = [
-        "//third-party:log",
-        "//third-party:proc-macro2",
-        "//third-party:quote",
-        "//third-party:serde",
-        "//third-party:thiserror",
-        "//third-party:once_cell",
-        "//third-party:itertools",
-        "//third-party:indexmap",
-        "//third-party:serde_json",
-        "//third-party:syn",
-    ],
+    deps = all_crate_deps(normal = True, package_name = "parser"),
 )
 
 rust_library(
     name = "autocxx-engine",
     srcs = glob(["engine/src/**/*.rs"]),
-    compile_data = glob(["**/*.md", "include/cxx.h"]),
     edition = "2021",
     visibility = ["//visibility:public"],
     crate_features = ["build"],
-    deps = [
-        "//third-party:log",
-        "//third-party:proc-macro2",
-        "//third-party:quote",
-	"//third-party:autocxx-bindgen",
-        "//third-party:itertools",
-        "//third-party:cc",
-        "//third-party:cxx-gen",
-	":autocxx-parser",
-        "//third-party:version_check",
-        "//third-party:tempfile",
-        "//third-party:once_cell",
-        "//third-party:serde_json",
-        "//third-party:miette",
-        "//third-party:thiserror",
-        "//third-party:regex",
-        "//third-party:indexmap",
-        "//third-party:prettyplease",
-        "//third-party:syn",
-    ],
-    proc_macro_deps = [
-        "//third-party:indoc",
-        "//third-party:aquamarine",
-        "//third-party:strum_macros",
-        "//third-party:rustversion",
-    ],
+    deps = all_crate_deps(normal = True, package_name = "engine") + [":autocxx-parser"],
+    proc_macro_deps = all_crate_deps(proc_macro = True, package_name = "engine"),
 )
 
 rust_library(
@@ -88,11 +55,7 @@ rust_library(
     srcs = glob(["gen/build/src/**/*.rs"]),
     edition = "2021",
     visibility = ["//visibility:public"],
-    deps = [
-        ":autocxx-engine",
-        "//third-party:env_logger",
-        "//third-party:indexmap",
-    ],
+    deps = all_crate_deps(normal = True, package_name = "gen/build"),
 )
 
 rust_binary(
@@ -100,13 +63,5 @@ rust_binary(
     srcs = glob(["gen/cmd/src/**/*.rs"]),
     edition = "2021",
     visibility = ["//visibility:public"],
-    deps = [
-        ":autocxx-engine",
-        "//third-party:clap",
-        "//third-party:proc-macro2",
-        "//third-party:env_logger",
-        "//third-party:pathdiff",
-        "//third-party:indexmap",
-        "//third-party:miette",
-    ],
+    deps = all_crate_deps(normal = True, package_name = "gen/cmd") + [":autocxx-engine"],
 )
diff --git a/demo/BUILD b/demo/BUILD
index a07af5bb2..e38048a32 100644
--- a/demo/BUILD
+++ b/demo/BUILD
@@ -1,5 +1,9 @@
 load("@rules_rust//rust:defs.bzl", "rust_binary")
 load("@rules_cc//cc:defs.bzl", "cc_library")
+load("//third-party/bazel:defs.bzl", "all_crate_deps")
+
+# referenced by third-party/BUILD.
+exports_files(["Cargo.toml"])
 
 src = "src/main.rs"
 
@@ -12,11 +16,7 @@ rust_binary(
         ":bridge/generated",
     ],
     edition = "2018",
-    deps = [
-        ":bridge",
-        "//:autocxx",
-        "//third-party:cxx",
-    ],
+    deps = all_crate_deps(normal = True, package_name = "demo") + ["//:autocxx", ":bridge"],
 )
 
 filegroup(
diff --git a/third-party/BUILD b/third-party/BUILD
index c999488cd..59d73810c 100644
--- a/third-party/BUILD
+++ b/third-party/BUILD
@@ -2,48 +2,20 @@ load("@rules_rust//crate_universe:defs.bzl", "crates_vendor")
 
 crates_vendor(
     name = "vendor",
-    cargo_lockfile = "//third-party:Cargo.lock",
-    generate_build_scripts = True,
-    manifests = ["//third-party:Cargo.toml"],
+    cargo_lockfile = "//:Cargo.lock",
+    manifests = [
+	    "//:Cargo.toml",
+	    "//:engine/Cargo.toml",
+	    "//:gen/build/Cargo.toml",
+	    "//:gen/cmd/Cargo.toml",
+	    "//:integration-tests/Cargo.toml",
+	    "//:macro/Cargo.toml",
+	    "//:parser/Cargo.toml",
+	    "//:tools/mdbook-preprocessor/Cargo.toml",
+	    "//:tools/reduce/Cargo.toml",
+	    # demo is a subpackage hence the file is exported via its BUILD.
+	    "//demo:Cargo.toml",
+    ],
     mode = "remote",
-    tags = ["manual"],
     vendor_path = "bazel",
 )
-
-[
-    alias(
-        name = name,
-        actual = "//third-party/bazel:{}".format(name),
-        visibility = ["//visibility:public"],
-    )
-    for name in [
-        "aquamarine",
-        "autocxx-bindgen",
-        "cc",
-        "clap",
-	"cxx",
-        "cxx-gen",
-        "env_logger",
-        "indexmap",
-        "indoc",
-        "itertools",
-        "log",
-        "miette",
-	"moveit",
-        "once_cell",
-        "pathdiff",
-        "prettyplease",
-        "proc-macro-error",
-        "proc-macro2",
-        "quote",
-        "regex",
-        "rustversion",
-        "serde_json",
-        "serde",
-        "strum_macros",
-        "syn",
-        "tempfile",
-        "thiserror",
-        "version_check",
-    ]
-]