diff --git a/.bazelversion b/.bazelversion
new file mode 100644
index 00000000..815da58b
--- /dev/null
+++ b/.bazelversion
@@ -0,0 +1 @@
+7.4.1
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 85681784..7cdbf5b5 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -69,6 +69,31 @@ jobs:
           sed -i -e 's/ --remote_download_outputs=all//' tools/built/src/setup-dev.sh
           docker build -t toxchat/toktok-stack:latest-dev -f tools/built/src/Dockerfile.dev .
 
+  local-build:
+    runs-on: ubuntu-22.04
+    if: false
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          submodules: recursive
+      - name: Download bazelisk
+        run: |
+          curl -L https://github.com/bazelbuild/bazelisk/releases/download/v1.25.0/bazelisk-amd64.deb -o bazelisk-amd64.deb
+          sudo apt-get install ./bazelisk-amd64.deb
+      - name: Install nix
+        run: |
+          curl -L https://nixos.org/nix/install -o install.sh
+          sh install.sh --no-channel-add --yes
+          rm install.sh
+          . "$HOME/.nix-profile/etc/profile.d/nix.sh"
+          nix-channel --add https://github.com/NixOS/nixpkgs/archive/a81bbdfb658428a45c69a42aa73d4bd18127c467.tar.gz nixpkgs
+          nix-channel --update
+      - name: Build
+        run: |
+          . /home/runner/.nix-profile/etc/profile.d/nix.sh
+          nix-shell -p patchelf --run "patchelf --version"
+          bazel build --config=local //...
+
   mypy:
     runs-on: ubuntu-22.04
     steps:
diff --git a/WORKSPACE b/WORKSPACE
index e741c7ca..1bdf221f 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -222,49 +222,49 @@ nixpkgs_python_configure(
 
 nixpkgs_package(
     name = "diffutils",
-    build_file = "//third_party:BUILD.diffutils",
+    build_file = "//third_party:diffutils.BUILD",
     repository = "@nixpkgs",
 )
 
 nixpkgs_package(
     name = "autoconf",
-    build_file = "//third_party:BUILD.autoconf",
+    build_file = "//third_party:autoconf.BUILD",
     repository = "@nixpkgs",
 )
 
 nixpkgs_package(
     name = "automake",
-    build_file = "//third_party:BUILD.automake",
+    build_file = "//third_party:automake.BUILD",
     repository = "@nixpkgs",
 )
 
 nixpkgs_package(
     name = "libtool",
-    build_file = "//third_party:BUILD.libtool",
+    build_file = "//third_party:libtool.BUILD",
     repository = "@nixpkgs",
 )
 
 nixpkgs_package(
     name = "m4",
-    build_file = "//third_party:BUILD.m4",
+    build_file = "//third_party:m4.BUILD",
     repository = "@nixpkgs",
 )
 
 nixpkgs_package(
     name = "cmake",
-    build_file = "//third_party:BUILD.cmake",
+    build_file = "//third_party:cmake.BUILD",
     repository = "@nixpkgs",
 )
 
 nixpkgs_package(
     name = "gnumake",
-    build_file = "//third_party:BUILD.gnumake",
+    build_file = "//third_party:gnumake.BUILD",
     repository = "@nixpkgs",
 )
 
 nixpkgs_package(
     name = "perl",
-    build_file = "//third_party:BUILD.perl",
+    build_file = "//third_party:perl.BUILD",
     repository = "@nixpkgs",
 )
 
@@ -383,7 +383,7 @@ haskell_register_ghc_nixpkgs(
 
 [nixpkgs_package(
     name = "haskellPackages." + tool,
-    build_file = "//third_party/haskell:BUILD." + tool,
+    build_file = "//third_party/haskell:" + tool + ".BUILD",
     repository = "@nixpkgs",
 ) for tool in [
     "alex",
@@ -452,7 +452,7 @@ nixpkgs_package(
 nixpkgs_package(
     name = "asound",
     attribute_path = "alsa-lib.dev",
-    build_file = "//third_party:BUILD.asound",
+    build_file = "//third_party:asound.BUILD",
     repository = "@nixpkgs",
 )
 
@@ -465,14 +465,14 @@ nixpkgs_package(
 nixpkgs_package(
     name = "openssl",
     attribute_path = "openssl.dev",
-    build_file = "//third_party:BUILD.openssl",
+    build_file = "//third_party:openssl.BUILD",
     repository = "@nixpkgs",
 )
 
 # https://ftp.gnu.org/pub/gnu/ncurses
 http_archive(
     name = "ncurses",
-    build_file = "@toktok//third_party:BUILD.ncurses",
+    build_file = "@toktok//third_party:ncurses.BUILD",
     integrity = "sha256-E22RvCaamleF5fnpgLx2q1dCj2BM4+WlqQzrx2eXHMY=",
     strip_prefix = "ncurses-6.5",
     urls = ["https://ftp.gnu.org/pub/gnu/ncurses/ncurses-6.5.tar.gz"],
@@ -480,7 +480,7 @@ http_archive(
 
 http_archive(
     name = "ev",
-    build_file = "@toktok//third_party:BUILD.ev",
+    build_file = "@toktok//third_party:ev.BUILD",
     sha256 = "507eb7b8d1015fbec5b935f34ebed15bf346bed04a11ab82b8eee848c4205aea",
     strip_prefix = "libev-4.33",
     urls = ["http://dist.schmorp.de/libev/libev-4.33.tar.gz"],
@@ -488,7 +488,7 @@ http_archive(
 
 http_archive(
     name = "bzip2",
-    build_file = "@toktok//third_party:BUILD.bzip2",
+    build_file = "@toktok//third_party:bzip2.BUILD",
     sha256 = "ab5a03176ee106d3f0fa90e381da478ddae405918153cca248e682cd0c4a2269",
     strip_prefix = "bzip2-1.0.8",
     urls = ["https://www.sourceware.org/pub/bzip2/bzip2-latest.tar.gz"],
@@ -521,7 +521,7 @@ new_github_archive(
 # https://ffmpeg.org/releases
 http_archive(
     name = "ffmpeg",
-    build_file = "@toktok//third_party:BUILD.ffmpeg",
+    build_file = "@toktok//third_party:ffmpeg.BUILD",
     sha256 = "fd59e6160476095082e94150ada5a6032d7dcc282fe38ce682a00c18e7820528",
     strip_prefix = "ffmpeg-7.1",
     urls = ["https://ffmpeg.org/releases/ffmpeg-7.1.tar.bz2"],
@@ -530,7 +530,7 @@ http_archive(
 # https://ftp.gnu.org/pub/gnu/gettext
 http_archive(
     name = "gettext",
-    build_file = "@toktok//third_party:BUILD.gettext",
+    build_file = "@toktok//third_party:gettext.BUILD",
     sha256 = "ec1705b1e969b83a9f073144ec806151db88127f5e40fe5a94cb6c8fa48996a0",
     strip_prefix = "gettext-0.22.5",
     urls = ["https://ftp.gnu.org/pub/gnu/gettext/gettext-0.22.5.tar.gz"],
@@ -545,7 +545,7 @@ nixpkgs_package(
 nixpkgs_package(
     name = "gl",
     attribute_path = "libGL.dev",
-    build_file = "@toktok//third_party:BUILD.gl",
+    build_file = "@toktok//third_party:gl.BUILD",
     repository = "@nixpkgs",
 )
 
@@ -558,14 +558,14 @@ nixpkgs_package(
 nixpkgs_package(
     name = "glvnd",
     attribute_path = "libglvnd.dev",
-    build_file = "@toktok//third_party:BUILD.glvnd",
+    build_file = "@toktok//third_party:glvnd.BUILD",
     repository = "@nixpkgs",
 )
 
 # https://github.com/nlohmann/json
 http_archive(
     name = "json",
-    build_file = "@toktok//third_party:BUILD.json",
+    build_file = "@toktok//third_party:json.BUILD",
     sha256 = "a22461d13119ac5c78f205d3df1db13403e58ce1bb1794edc9313677313f4a9d",
     strip_prefix = "include",
     urls = ["https://github.com/nlohmann/json/releases/download/v3.11.3/include.zip"],
@@ -573,7 +573,7 @@ http_archive(
 
 http_archive(
     name = "libcap",
-    build_file = "@toktok//third_party:BUILD.libcap",
+    build_file = "@toktok//third_party:libcap.BUILD",
     sha256 = "db7de848064e656a0bb528dae6d53ff20c82e849d509cecd015a04d2fec8369d",
     strip_prefix = "libcap-2.33",
     urls = ["https://www.kernel.org/pub/linux/libs/security/linux-privs/libcap2/libcap-2.33.tar.gz"],
@@ -589,7 +589,7 @@ new_github_archive(
 
 http_archive(
     name = "libidn2",
-    build_file = "@toktok//third_party:BUILD.libidn2",
+    build_file = "@toktok//third_party:libidn2.BUILD",
     sha256 = "e1cb1db3d2e249a6a3eb6f0946777c2e892d5c5dc7bd91c74394fc3a01cab8b5",
     strip_prefix = "libidn2-2.3.0",
     urls = ["https://ftp.gnu.org/gnu/libidn/libidn2-2.3.0.tar.gz"],
@@ -648,7 +648,7 @@ new_github_archive(
 
 http_archive(
     name = "pthread_w32",
-    build_file = "@toktok//third_party:BUILD.pthread_w32",
+    build_file = "@toktok//third_party:pthread_w32.BUILD",
     sha256 = "e6aca7aea8de33d9c8580bcb3a0ea3ec0a7ace4ba3f4e263ac7c7b66bc95fb4d",
     strip_prefix = "pthreads-w32-2-9-1-release",
     urls = ["https://sourceware.org/pub/pthreads-win32/pthreads-w32-2-9-1-release.tar.gz"],
@@ -656,20 +656,20 @@ http_archive(
 
 new_local_repository(
     name = "pthread",
-    build_file = "//third_party:BUILD.pthread",
+    build_file = "//third_party:pthread.BUILD",
     path = "third_party/pthread",
 )
 
 new_local_repository(
     name = "psocket",
-    build_file = "//third_party:BUILD.psocket",
+    build_file = "//third_party:psocket.BUILD",
     path = "third_party",
 )
 
 # https://github.com/tukaani-project/xz/releases
 http_archive(
     name = "libxz",
-    build_file = "@toktok//third_party:BUILD.libxz",
+    build_file = "@toktok//third_party:libxz.BUILD",
     sha256 = "b1d45295d3f71f25a4c9101bd7c8d16cb56348bbef3bbc738da0351e17c73317",
     strip_prefix = "xz-5.6.3",
     urls = ["https://github.com/tukaani-project/xz/releases/download/v5.6.3/xz-5.6.3.tar.gz"],
@@ -677,7 +677,7 @@ http_archive(
 
 http_archive(
     name = "sdl2",
-    build_file = "@toktok//third_party:BUILD.sdl2",
+    build_file = "@toktok//third_party:sdl2.BUILD",
     sha256 = "349268f695c02efbc9b9148a70b85e58cefbbf704abd3e91be654db7f1e2c863",
     strip_prefix = "SDL2-2.0.12",
     urls = ["https://github.com/libsdl-org/SDL/releases/download/release-2.0.12/SDL2-2.0.12.tar.gz"],
@@ -703,46 +703,6 @@ new_github_archive(
     version = "a18a9d248b4794c7a0c70698c2575bc78d3c1ae4",
 )
 
-nixpkgs_package(
-    name = "libnotify.out",
-    attribute_path = "libnotify",
-    repository = "@nixpkgs",
-)
-
-nixpkgs_package(
-    name = "libnotify",
-    attribute_path = "libnotify.dev",
-    build_file = "@toktok//third_party:BUILD.libnotify",
-    repository = "@nixpkgs",
-)
-
-nixpkgs_package(
-    name = "gdk-pixbuf.out",
-    attribute_path = "gdk-pixbuf",
-    repository = "@nixpkgs",
-)
-
-nixpkgs_package(
-    name = "gdk-pixbuf",
-    attribute_path = "gdk-pixbuf.dev",
-    build_file = "@toktok//third_party:BUILD.gdk-pixbuf",
-    repository = "@nixpkgs",
-)
-
-nixpkgs_package(
-    name = "glib.out",
-    attribute_path = "glib.out",
-    build_file = "@toktok//third_party:BUILD.glib.out",
-    repository = "@nixpkgs",
-)
-
-nixpkgs_package(
-    name = "glib",
-    attribute_path = "glib.dev",
-    build_file = "@toktok//third_party:BUILD.glib",
-    repository = "@nixpkgs",
-)
-
 nixpkgs_package(
     name = "x11.out",
     attribute_path = "xorg.libX11.out",
@@ -752,7 +712,7 @@ nixpkgs_package(
 nixpkgs_package(
     name = "x11",
     attribute_path = "xorg.libX11.dev",
-    build_file = "@toktok//third_party:BUILD.x11",
+    build_file = "@toktok//third_party:x11.BUILD",
     repository = "@nixpkgs",
 )
 
@@ -765,7 +725,7 @@ nixpkgs_package(
 nixpkgs_package(
     name = "xcb",
     attribute_path = "xorg.libxcb.dev",
-    build_file = "@toktok//third_party:BUILD.xcb",
+    build_file = "@toktok//third_party:xcb.BUILD",
     repository = "@nixpkgs",
 )
 
@@ -778,7 +738,7 @@ nixpkgs_package(
 nixpkgs_package(
     name = "xext",
     attribute_path = "xorg.libXext.dev",
-    build_file = "@toktok//third_party:BUILD.xext",
+    build_file = "@toktok//third_party:xext.BUILD",
     repository = "@nixpkgs",
 )
 
@@ -791,21 +751,21 @@ nixpkgs_package(
 nixpkgs_package(
     name = "xxf86vm",
     attribute_path = "xorg.libXxf86vm.dev",
-    build_file = "@toktok//third_party:BUILD.xxf86vm",
+    build_file = "@toktok//third_party:xxf86vm.BUILD",
     repository = "@nixpkgs",
 )
 
 nixpkgs_package(
     name = "xproto",
     attribute_path = "xorg.xorgproto.out",
-    build_file = "@toktok//third_party:BUILD.xproto",
+    build_file = "@toktok//third_party:xproto.BUILD",
     repository = "@nixpkgs",
 )
 
 nixpkgs_package(
     name = "xss",
     attribute_path = "xorg.libXScrnSaver",
-    build_file = "@toktok//third_party:BUILD.xss",
+    build_file = "@toktok//third_party:xss.BUILD",
     repository = "@nixpkgs",
 )
 
@@ -864,20 +824,20 @@ QT_LIBS = [
 
 [nixpkgs_package(
     name = "qt6.qt%s.out" % lib,
-    build_file = "//third_party/qt:BUILD.qt%s.out" % lib,
+    build_file = "//third_party/qt:qt%s.out.BUILD" % lib,
     repository = "@nixpkgs",
 ) for lib in QT_LIBS]
 
 [nixpkgs_package(
     name = "qt6.qt%s" % lib,
-    build_file = "//third_party/qt:BUILD.qt%s.dev" % lib,
+    build_file = "//third_party/qt:qt%s.dev.BUILD" % lib,
     repository = "@nixpkgs",
 ) for lib in QT_LIBS]
 
 nixpkgs_package(
     name = "qt",
     attribute_path = "qt6.qttools.dev",
-    build_file = "//third_party:BUILD.qt",
+    build_file = "//third_party:qt.BUILD",
     repository = "@nixpkgs",
 )
 
diff --git a/third_party/BUILD.bazel b/third_party/BUILD.bazel
index fc0cf4bc..6aaa5980 100644
--- a/third_party/BUILD.bazel
+++ b/third_party/BUILD.bazel
@@ -4,18 +4,17 @@ filegroup(
     name = "third_party",
     srcs = select({
         "@toktok//tools/config:arm64": [],
-        "@toktok//tools/config:linux-x86_64": ["@{pkg}//:{pkg}".format(pkg = pkg[len("BUILD."):]) for pkg in glob(
-            ["BUILD.*"],
+        "@toktok//tools/config:linux-x86_64": ["@{pkg}//:{pkg}".format(pkg = pkg[:-len(".BUILD")]) for pkg in glob(
+            ["*.BUILD"],
             exclude = [
-                "BUILD.bazel*",
-                "BUILD.*.out",
+                "*.out.BUILD",
                 # TODO
-                "BUILD.asound",
-                "BUILD.ffmpeg",
-                "BUILD.openal",
-                "BUILD.openssl",
-                "BUILD.sdl2",
-                "BUILD.x264",
+                "asound.BUILD",
+                "ffmpeg.BUILD",
+                "openal.BUILD",
+                "openssl.BUILD",
+                "sdl2.BUILD",
+                "x264.BUILD",
             ],
         )] + [
             "@com_google_googletest//:gtest",
diff --git a/third_party/BUILD.bazel_toolchain b/third_party/BUILD.bazel_toolchain
deleted file mode 100644
index f2e96d36..00000000
--- a/third_party/BUILD.bazel_toolchain
+++ /dev/null
@@ -1 +0,0 @@
-# This just exists so there's a BUILD file in @bazel_toolchain.
diff --git a/third_party/BUILD.gdk-pixbuf b/third_party/BUILD.gdk-pixbuf
deleted file mode 100644
index c8d01dbd..00000000
--- a/third_party/BUILD.gdk-pixbuf
+++ /dev/null
@@ -1,10 +0,0 @@
-# bazel
-load("@rules_cc//cc:defs.bzl", "cc_library")
-
-cc_library(
-    name = "gdk-pixbuf",
-    srcs = ["@gdk-pixbuf.out//:lib"],
-    hdrs = glob(["include/gdk-pixbuf-2.0/**/*.h"]),
-    strip_include_prefix = "include/gdk-pixbuf-2.0",
-    visibility = ["//visibility:public"],
-)
diff --git a/third_party/BUILD.glib b/third_party/BUILD.glib
deleted file mode 100644
index cdb74de6..00000000
--- a/third_party/BUILD.glib
+++ /dev/null
@@ -1,11 +0,0 @@
-# bazel
-load("@rules_cc//cc:defs.bzl", "cc_library")
-
-cc_library(
-    name = "glib",
-    srcs = ["@glib.out//:lib"],
-    hdrs = glob(["include/glib-2.0/**/*.h"]),
-    strip_include_prefix = "include/glib-2.0",
-    visibility = ["//visibility:public"],
-    deps = ["@glib.out//:glibconfig"],
-)
diff --git a/third_party/BUILD.glib.out b/third_party/BUILD.glib.out
deleted file mode 100755
index 00e45ab5..00000000
--- a/third_party/BUILD.glib.out
+++ /dev/null
@@ -1,21 +0,0 @@
-load("@rules_cc//cc:defs.bzl", "cc_library")
-
-filegroup(
-    name = "lib",
-    srcs = glob(
-        [
-            "lib/**/*.so*",
-            "lib/**/*.dylib",
-            "lib/**/*.a",
-        ],
-        allow_empty = True,
-    ),
-    visibility = ["@glib//:__pkg__"],
-)
-
-cc_library(
-    name = "glibconfig",
-    hdrs = ["lib/glib-2.0/include/glibconfig.h"],
-    strip_include_prefix = "lib/glib-2.0/include",
-    visibility = ["@glib//:__pkg__"],
-)
diff --git a/third_party/BUILD.libnotify b/third_party/BUILD.libnotify
deleted file mode 100644
index 22da2c3e..00000000
--- a/third_party/BUILD.libnotify
+++ /dev/null
@@ -1,14 +0,0 @@
-# bazel
-load("@rules_cc//cc:defs.bzl", "cc_library")
-
-cc_library(
-    name = "libnotify",
-    srcs = ["@libnotify.out//:lib"],
-    hdrs = glob(["include/libnotify/*.h"]),
-    strip_include_prefix = "include",
-    visibility = ["//visibility:public"],
-    deps = [
-        "@gdk-pixbuf",
-        "@glib",
-    ],
-)
diff --git a/third_party/BUILD.asound b/third_party/asound.BUILD
similarity index 100%
rename from third_party/BUILD.asound
rename to third_party/asound.BUILD
diff --git a/third_party/BUILD.autoconf b/third_party/autoconf.BUILD
similarity index 100%
rename from third_party/BUILD.autoconf
rename to third_party/autoconf.BUILD
diff --git a/third_party/BUILD.automake b/third_party/automake.BUILD
similarity index 100%
rename from third_party/BUILD.automake
rename to third_party/automake.BUILD
diff --git a/third_party/BUILD.bzip2 b/third_party/bzip2.BUILD
similarity index 100%
rename from third_party/BUILD.bzip2
rename to third_party/bzip2.BUILD
diff --git a/third_party/BUILD.cmake b/third_party/cmake.BUILD
similarity index 100%
rename from third_party/BUILD.cmake
rename to third_party/cmake.BUILD
diff --git a/third_party/BUILD.diffutils b/third_party/diffutils.BUILD
similarity index 100%
rename from third_party/BUILD.diffutils
rename to third_party/diffutils.BUILD
diff --git a/third_party/BUILD.ev b/third_party/ev.BUILD
similarity index 100%
rename from third_party/BUILD.ev
rename to third_party/ev.BUILD
diff --git a/third_party/BUILD.ffmpeg b/third_party/ffmpeg.BUILD
similarity index 100%
rename from third_party/BUILD.ffmpeg
rename to third_party/ffmpeg.BUILD
diff --git a/third_party/BUILD.ffnvcodec b/third_party/ffnvcodec.BUILD
similarity index 100%
rename from third_party/BUILD.ffnvcodec
rename to third_party/ffnvcodec.BUILD
diff --git a/third_party/BUILD.gettext b/third_party/gettext.BUILD
similarity index 100%
rename from third_party/BUILD.gettext
rename to third_party/gettext.BUILD
diff --git a/third_party/BUILD.gl b/third_party/gl.BUILD
similarity index 100%
rename from third_party/BUILD.gl
rename to third_party/gl.BUILD
diff --git a/third_party/BUILD.glvnd b/third_party/glvnd.BUILD
similarity index 100%
rename from third_party/BUILD.glvnd
rename to third_party/glvnd.BUILD
diff --git a/third_party/BUILD.gnumake b/third_party/gnumake.BUILD
similarity index 100%
rename from third_party/BUILD.gnumake
rename to third_party/gnumake.BUILD
diff --git a/third_party/haskell/BUILD.alex b/third_party/haskell/alex.BUILD
similarity index 100%
rename from third_party/haskell/BUILD.alex
rename to third_party/haskell/alex.BUILD
diff --git a/third_party/haskell/BUILD.happy b/third_party/haskell/happy.BUILD
similarity index 100%
rename from third_party/haskell/BUILD.happy
rename to third_party/haskell/happy.BUILD
diff --git a/third_party/haskell/haskell.bzl b/third_party/haskell/haskell.bzl
deleted file mode 100644
index e66a0fa2..00000000
--- a/third_party/haskell/haskell.bzl
+++ /dev/null
@@ -1,26 +0,0 @@
-"""Workspace rules for importing Haskell packages."""
-
-load("@ai_formation_hazel//tools:mangling.bzl", "hazel_workspace")
-load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
-
-def new_cabal_package(package, sha256 = None, url = None, strip_prefix = None, patches = None, path = None):
-    url = url or "https://hackage.haskell.org/package/%s/%s.tar.gz" % (package, package)
-    strip_prefix = strip_prefix or package
-
-    package_name, _ = package.rsplit("-", 1)
-
-    if path:
-        native.new_local_repository(
-            name = hazel_workspace(package_name),
-            build_file = "@toktok//third_party/haskell:BUILD.%s" % package_name,
-            path = path,
-        )
-    else:
-        http_archive(
-            name = hazel_workspace(package_name),
-            build_file = "@toktok//third_party/haskell:BUILD.%s" % package_name,
-            patches = patches,
-            sha256 = sha256,
-            strip_prefix = strip_prefix,
-            urls = [url],
-        )
diff --git a/third_party/haskell/BUILD.hspec-discover b/third_party/haskell/hspec-discover.BUILD
similarity index 100%
rename from third_party/haskell/BUILD.hspec-discover
rename to third_party/haskell/hspec-discover.BUILD
diff --git a/third_party/BUILD.json b/third_party/json.BUILD
similarity index 100%
rename from third_party/BUILD.json
rename to third_party/json.BUILD
diff --git a/third_party/BUILD.libcap b/third_party/libcap.BUILD
similarity index 100%
rename from third_party/BUILD.libcap
rename to third_party/libcap.BUILD
diff --git a/third_party/BUILD.libexif b/third_party/libexif.BUILD
similarity index 100%
rename from third_party/BUILD.libexif
rename to third_party/libexif.BUILD
diff --git a/third_party/BUILD.libidn2 b/third_party/libidn2.BUILD
similarity index 100%
rename from third_party/BUILD.libidn2
rename to third_party/libidn2.BUILD
diff --git a/third_party/BUILD.libqrencode b/third_party/libqrencode.BUILD
similarity index 100%
rename from third_party/BUILD.libqrencode
rename to third_party/libqrencode.BUILD
diff --git a/third_party/BUILD.libsodium b/third_party/libsodium.BUILD
similarity index 100%
rename from third_party/BUILD.libsodium
rename to third_party/libsodium.BUILD
diff --git a/third_party/BUILD.libtool b/third_party/libtool.BUILD
similarity index 100%
rename from third_party/BUILD.libtool
rename to third_party/libtool.BUILD
diff --git a/third_party/BUILD.libvpx b/third_party/libvpx.BUILD
similarity index 98%
rename from third_party/BUILD.libvpx
rename to third_party/libvpx.BUILD
index 48101b96..f6ba8a5c 100644
--- a/third_party/BUILD.libvpx
+++ b/third_party/libvpx.BUILD
@@ -224,10 +224,7 @@ cc_library(
         "vpx/vpx_encoder.h",
         "vpx/vpx_image.h",
     ],
-    copts = [
-        "-I$(GENDIR)/external/libvpx",
-        "-Iexternal/libvpx",
-    ] + select({
+    copts = select({
         "@toktok//tools/config:windows": [],
         "//conditions:default": ["-fvisibility=protected"],
     }),
diff --git a/third_party/BUILD.libxz b/third_party/libxz.BUILD
similarity index 100%
rename from third_party/BUILD.libxz
rename to third_party/libxz.BUILD
diff --git a/third_party/BUILD.libzmq b/third_party/libzmq.BUILD
similarity index 100%
rename from third_party/BUILD.libzmq
rename to third_party/libzmq.BUILD
diff --git a/third_party/BUILD.m4 b/third_party/m4.BUILD
similarity index 100%
rename from third_party/BUILD.m4
rename to third_party/m4.BUILD
diff --git a/third_party/BUILD.mypy b/third_party/mypy.BUILD
similarity index 100%
rename from third_party/BUILD.mypy
rename to third_party/mypy.BUILD
diff --git a/third_party/BUILD.mypy_extensions b/third_party/mypy_extensions.BUILD
similarity index 100%
rename from third_party/BUILD.mypy_extensions
rename to third_party/mypy_extensions.BUILD
diff --git a/third_party/BUILD.ncurses b/third_party/ncurses.BUILD
similarity index 100%
rename from third_party/BUILD.ncurses
rename to third_party/ncurses.BUILD
diff --git a/third_party/BUILD.openal b/third_party/openal.BUILD
similarity index 100%
rename from third_party/BUILD.openal
rename to third_party/openal.BUILD
diff --git a/third_party/BUILD.openssl b/third_party/openssl.BUILD
similarity index 100%
rename from third_party/BUILD.openssl
rename to third_party/openssl.BUILD
diff --git a/third_party/BUILD.opus b/third_party/opus.BUILD
similarity index 100%
rename from third_party/BUILD.opus
rename to third_party/opus.BUILD
diff --git a/third_party/BUILD.perl b/third_party/perl.BUILD
similarity index 100%
rename from third_party/BUILD.perl
rename to third_party/perl.BUILD
diff --git a/third_party/BUILD.psocket b/third_party/psocket.BUILD
similarity index 100%
rename from third_party/BUILD.psocket
rename to third_party/psocket.BUILD
diff --git a/third_party/BUILD.pthread b/third_party/pthread.BUILD
similarity index 100%
rename from third_party/BUILD.pthread
rename to third_party/pthread.BUILD
diff --git a/third_party/BUILD.pthread_w32 b/third_party/pthread_w32.BUILD
similarity index 100%
rename from third_party/BUILD.pthread_w32
rename to third_party/pthread_w32.BUILD
diff --git a/third_party/BUILD.qt b/third_party/qt.BUILD
similarity index 100%
rename from third_party/BUILD.qt
rename to third_party/qt.BUILD
diff --git a/third_party/qt/BUILD.qtbase.dev b/third_party/qt/qtbase.dev.BUILD
similarity index 100%
rename from third_party/qt/BUILD.qtbase.dev
rename to third_party/qt/qtbase.dev.BUILD
diff --git a/third_party/qt/BUILD.qtbase.out b/third_party/qt/qtbase.out.BUILD
similarity index 100%
rename from third_party/qt/BUILD.qtbase.out
rename to third_party/qt/qtbase.out.BUILD
diff --git a/third_party/qt/BUILD.qtsvg.dev b/third_party/qt/qtsvg.dev.BUILD
similarity index 100%
rename from third_party/qt/BUILD.qtsvg.dev
rename to third_party/qt/qtsvg.dev.BUILD
diff --git a/third_party/qt/BUILD.qtsvg.out b/third_party/qt/qtsvg.out.BUILD
similarity index 100%
rename from third_party/qt/BUILD.qtsvg.out
rename to third_party/qt/qtsvg.out.BUILD
diff --git a/third_party/BUILD.sdl2 b/third_party/sdl2.BUILD
similarity index 100%
rename from third_party/BUILD.sdl2
rename to third_party/sdl2.BUILD
diff --git a/third_party/BUILD.sqlcipher b/third_party/sqlcipher.BUILD
similarity index 100%
rename from third_party/BUILD.sqlcipher
rename to third_party/sqlcipher.BUILD
diff --git a/third_party/BUILD.tcl b/third_party/tcl.BUILD
similarity index 100%
rename from third_party/BUILD.tcl
rename to third_party/tcl.BUILD
diff --git a/third_party/BUILD.typeshed b/third_party/typeshed.BUILD
similarity index 100%
rename from third_party/BUILD.typeshed
rename to third_party/typeshed.BUILD
diff --git a/third_party/BUILD.typing_extensions b/third_party/typing_extensions.BUILD
similarity index 100%
rename from third_party/BUILD.typing_extensions
rename to third_party/typing_extensions.BUILD
diff --git a/third_party/BUILD.x11 b/third_party/x11.BUILD
similarity index 100%
rename from third_party/BUILD.x11
rename to third_party/x11.BUILD
diff --git a/third_party/BUILD.xcb b/third_party/xcb.BUILD
similarity index 100%
rename from third_party/BUILD.xcb
rename to third_party/xcb.BUILD
diff --git a/third_party/BUILD.xext b/third_party/xext.BUILD
similarity index 100%
rename from third_party/BUILD.xext
rename to third_party/xext.BUILD
diff --git a/third_party/BUILD.xproto b/third_party/xproto.BUILD
similarity index 100%
rename from third_party/BUILD.xproto
rename to third_party/xproto.BUILD
diff --git a/third_party/BUILD.xss b/third_party/xss.BUILD
similarity index 100%
rename from third_party/BUILD.xss
rename to third_party/xss.BUILD
diff --git a/third_party/BUILD.xxf86vm b/third_party/xxf86vm.BUILD
similarity index 100%
rename from third_party/BUILD.xxf86vm
rename to third_party/xxf86vm.BUILD
diff --git a/third_party/BUILD.yasm b/third_party/yasm.BUILD
similarity index 100%
rename from third_party/BUILD.yasm
rename to third_party/yasm.BUILD
diff --git a/tools/built/src/home/.config/home-manager/home.nix b/tools/built/src/home/.config/home-manager/home.nix
index 2fc15c4f..689bc513 100644
--- a/tools/built/src/home/.config/home-manager/home.nix
+++ b/tools/built/src/home/.config/home-manager/home.nix
@@ -112,7 +112,7 @@
       map Q gqap
 
       au BufEnter *.x,*.y set ts=8 sw=8 noexpandtab
-      au BufEnter BUILD.* set ft=bzl
+      au BufEnter BUILD.*,*.BUILD set ft=bzl
       au FileType sh,javascript set ts=2 sw=2
       au FileType go set noexpandtab
       " .lhs files need a long distance sync for highlighting
diff --git a/tools/built/src/home/.vimrc b/tools/built/src/home/.vimrc
index b14934ac..a4b15f2f 100644
--- a/tools/built/src/home/.vimrc
+++ b/tools/built/src/home/.vimrc
@@ -44,7 +44,7 @@ au BufEnter *.h,*.cc,*.cpp					:set syntax=cpp.doxygen
 au BufEnter *.c							:set syntax=c.doxygen
 au BufEnter *.y,*.x						:set noexpandtab tw=150
 
-au BufEnter BUILD.*						:set ft=starlark
+au BufEnter *.BUILD,BUILD.*					:set ft=starlark
 
 au BufEnter *.hs,*.lhs						:set autoindent nocindent smartindent
 
diff --git a/tools/workspace/github.bzl b/tools/workspace/github.bzl
index d1ef4796..7bd47f06 100644
--- a/tools/workspace/github.bzl
+++ b/tools/workspace/github.bzl
@@ -40,7 +40,7 @@ def github_archive(name, repo, version, is_release = False, strip_prefix = "", *
 def new_github_archive(name, **kwargs):
     """new_http_archive but for GitHub downloads."""
     if "build_file" not in kwargs and "build_file_content" not in kwargs:
-        kwargs["build_file"] = "@toktok//third_party:BUILD.%s" % name
+        kwargs["build_file"] = "@toktok//third_party:%s.BUILD" % name
     github_archive(
         name = name,
         **kwargs
diff --git a/tools/workspace/local.bzl b/tools/workspace/local.bzl
index 6c06860d..2449d928 100644
--- a/tools/workspace/local.bzl
+++ b/tools/workspace/local.bzl
@@ -12,7 +12,7 @@ def _impl(repository_ctx):
         "BUILD",
         repository_ctx.read(
             repository_ctx.path(
-                Label("@toktok//third_party:BUILD." + name),
+                Label("@toktok//third_party:" + name + ".BUILD"),
             ),
         ),
     )
diff --git a/tools/workspace/qt.bzl b/tools/workspace/qt.bzl
index 74c5b6dd..ed944b99 100644
--- a/tools/workspace/qt.bzl
+++ b/tools/workspace/qt.bzl
@@ -9,7 +9,7 @@ def _impl(repository_ctx):
         "BUILD",
         repository_ctx.read(
             repository_ctx.path(
-                Label("@toktok//third_party:BUILD.qt"),
+                Label("@toktok//third_party:qt.BUILD"),
             ),
         ),
     )