diff --git a/WORKSPACE b/WORKSPACE
index f5428db..70b3623 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -1,6 +1,8 @@
 workspace(name = "org_frc971")
 
 load("@bazel_tools//tools/build_defs/repo:git.bzl", "new_git_repository")
+load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive", "http_file")
+
 load(
     "//debian:python.bzl",
     python_debs = "files",
@@ -69,23 +71,23 @@
 
 generate_repositories_for_debs(ruby_debs)
 
-new_http_archive(
+http_archive(
     name = "python_repo",
-    build_file = "debian/python.BUILD",
+    build_file = "@//debian:python.BUILD",
     sha256 = "4ff939f90cffd8c72f9992d7420481e361b6016b0ce5c6fa701be0691d4e20fa",
     url = "http://www.frc971.org/Build-Dependencies/python-2.tar.gz",
 )
 
-new_http_archive(
+http_archive(
     name = "clang_3p6_repo",
-    build_file = "tools/cpp/clang_3p6/clang_3p6.BUILD",
+    build_file = "@//tools/cpp/clang_3p6:clang_3p6.BUILD",
     sha256 = "5ee9e04c55c2c99d0c0f83722102a49e98f485fc274f73111b33a7ac4e34e03e",
     url = "http://www.frc971.org/Build-Dependencies/clang_3p6.tar.gz",
 )
 
 new_local_repository(
     name = "usr_repo",
-    build_file = "debian/usr.BUILD",
+    build_file = "@//debian:usr.BUILD",
     path = "/usr",
 )
 
@@ -96,16 +98,16 @@
     remote = "https://github.com/avventi/Slycot.git",
 )
 
-new_http_archive(
+http_archive(
     name = "ruby_repo",
-    build_file = "debian/ruby.BUILD",
+    build_file = "@//debian:ruby.BUILD",
     sha256 = "d3e21cca0abcad933de0d4095da35344a60475d1f5828ee99283ed4250ee1320",
     url = "http://www.frc971.org/Build-Dependencies/ruby.tar.gz",
 )
 
-new_http_archive(
+http_archive(
     name = "arm_frc_linux_gnueabi_repo",
-    build_file = "tools/cpp/arm-frc-linux-gnueabi/arm-frc-linux-gnueabi.BUILD",
+    build_file = "@//tools/cpp/arm-frc-linux-gnueabi:arm-frc-linux-gnueabi.BUILD",
     sha256 = "d627c5e437db99780a938392499ef71aecbfb0e9b3fffd53bde7e402a6af4f32",
     strip_prefix = "frc2019/roborio/",
     url = "http://www.frc971.org/Build-Dependencies/FRC-2019-Linux-Toolchain-6.3.0-v2019-3.tar.gz",
@@ -115,9 +117,9 @@
 # <https://releases.linaro.org/15.05/components/toolchain/binaries/arm-linux-gnueabihf/gcc-linaro-4.9-2015.05-x86_64_arm-linux-gnueabihf.tar.xz>,
 # with workarounds for <https://github.com/bazelbuild/bazel/issues/574> and the
 # top-level folder stripped off.
-new_http_archive(
+http_archive(
     name = "linaro_linux_gcc_4_9_repo",
-    build_file = "compilers/linaro_linux_gcc_4.9.BUILD",
+    build_file = "@//:compilers/linaro_linux_gcc_4.9.BUILD",
     sha256 = "25e97bcb0af4fd7cd626d5bb1b303c7d2cb13acf2474e335e3d431d1a53fbb52",
     url = "http://www.frc971.org/Build-Dependencies/gcc-linaro-4.9-2015.05-x86_64_arm-linux-gnueabihf.tar.gz",
 )
@@ -139,9 +141,9 @@
     path = "third_party/gflags",
 )
 
-new_http_archive(
+http_archive(
     name = "python_glog_repo",
-    build_file = "debian/glog.BUILD",
+    build_file = "@//debian:glog.BUILD",
     sha256 = "953fd80122c48023d1148e6d1bda2763fcab59c8a81682bb298238a5935547b0",
     strip_prefix = "glog-0.1",
     url = "https://pypi.python.org/packages/source/g/glog/glog-0.1.tar.gz",
@@ -155,18 +157,18 @@
 # Generated with:
 # git fetch https://github.com/wpilibsuite/ni-libraries master
 # git archive --output=allwpilib_ni-libraries_4785480.tar.gz --format=tar.gz 4785480
-new_http_archive(
+http_archive(
     name = "allwpilib_ni_libraries_2019",
-    build_file = "debian/ni-libraries-2019.BUILD",
+    build_file = "@//debian:ni-libraries-2019.BUILD",
     sha256 = "2cdcde3391f36877b7533e15d0f36baf696b27c1107b77192a8200e26f13278c",
     url = "http://www.frc971.org/Build-Dependencies/allwpilib_ni-libraries_4785480.tar.gz",
 )
 
 # Downloaded from:
 # https://pypi.python.org/packages/source/s/six/six-1.10.0.tar.gz
-new_http_archive(
+http_archive(
     name = "six_repo",
-    build_file = "debian/six.BUILD",
+    build_file = "@//debian:six.BUILD",
     sha256 = "105f8d68616f8248e24bf0e9372ef04d3cc10104f1980f54d57b2ce73a5ad56a",
     strip_prefix = "six-1.10.0",
     url = "http://www.frc971.org/Build-Dependencies/six-1.10.0.tar.gz",
@@ -192,101 +194,102 @@
 http_file(
     name = "libusb_1_0_windows",
     sha256 = "fc2ba03992f343aabbaf9eb90559c6e00cdc6a2bd914d7cebea85857d5244015",
-    url = "http://www.frc971.org/Build-Dependencies/libusb-1.0.21-windows.tar.xz",
+    urls = ["http://www.frc971.org/Build-Dependencies/libusb-1.0.21-windows.tar.xz"],
+    downloaded_file_path = "libusb-1.0.21-windows.tar.xz",
 )
 
 # The data tarball of the same-named Debian package.
-new_http_archive(
+http_archive(
     name = "f2c",
-    build_file = "debian/f2c.BUILD",
+    build_file = "@//debian:f2c.BUILD",
     sha256 = "2c677437f8217a2e2b23e41b33995d0571644fc1bea46de858f8913a5053e3f4",
     url = "http://www.frc971.org/Build-Dependencies/f2c_20100827-1_amd64.xz.tar.xz",
 )
 
 # Downloaded from http://www.netlib.org/clapack/.
-new_http_archive(
+http_archive(
     name = "clapack",
-    build_file = "debian/clapack.BUILD",
+    build_file = "@//debian:clapack.BUILD",
     sha256 = "6dc4c382164beec8aaed8fd2acc36ad24232c406eda6db462bd4c41d5e455fac",
     strip_prefix = "CLAPACK-3.2.1/",
     url = "http://www.frc971.org/Build-Dependencies/clapack-3.2.1.tgz",
 )
 
-new_http_archive(
+http_archive(
     name = "patch",
-    build_file = "debian/patch.BUILD",
+    build_file = "@//debian:patch.BUILD",
     sha256 = "b5ce139648a2e04f5585948ddad2fdae24dd4ee7976ac5a22d6ae7bd5674631e",
     url = "http://www.frc971.org/Build-Dependencies/patch.tar.gz",
 )
 
-new_http_archive(
+http_archive(
     name = "pandoc",
-    build_file = "debian/pandoc.BUILD",
+    build_file = "@//debian:pandoc.BUILD",
     sha256 = "9f7a7adb3974a1f14715054c349ff3edc2909e920dbe3438fca437a83845f3c4",
     url = "http://www.frc971.org/Build-Dependencies/pandoc.tar.gz",
 )
 
-new_http_archive(
+http_archive(
     name = "libusb",
-    build_file = "debian/libusb.BUILD",
+    build_file = "@//debian:libusb.BUILD",
     sha256 = "3ca5cc2d317226f6646866ff9e8c443db3b0f6c82f828e800240982727531590",
     url = "http://www.frc971.org/Build-Dependencies/libusb.tar.gz",
 )
 
-new_http_archive(
+http_archive(
     name = "mingw_compiler",
-    build_file = "debian/mingw_compiler.BUILD",
+    build_file = "@//debian:mingw_compiler.BUILD",
     sha256 = "45e86a8460f2151a4f0306e7ae7b06761029d2412ee16f63d1e8d2d29354e378",
     url = "http://www.frc971.org/Build-Dependencies/mingw_compiler.tar.gz",
 )
 
-new_http_archive(
+http_archive(
     name = "matplotlib",
-    build_file = "debian/matplotlib.BUILD",
+    build_file = "@//debian:matplotlib.BUILD",
     sha256 = "dc8e04123a93180bf89727bf6b5a5a0f6d210b6c1c5eaec148f7f8183abbce24",
     url = "http://www.frc971.org/Build-Dependencies/matplotlib-2.tar.gz",
 )
 
-new_http_archive(
+http_archive(
     name = "patchelf",
-    build_file = "debian/patchelf.BUILD",
+    build_file = "@//debian:patchelf.BUILD",
     sha256 = "bf8b709909d7d9e30815dd228eeded7dc282e3ce3919d0589ccbb56ac8632abc",
     url = "http://www.frc971.org/Build-Dependencies/patchelf.tar.gz",
 )
 
-new_http_archive(
+http_archive(
     name = "arm_frc_gnueabi_deps",
-    build_file = "debian/arm_frc_gnueabi_deps.BUILD",
+    build_file = "@//debian:arm_frc_gnueabi_deps.BUILD",
     sha256 = "4b26fe45010817dc136488ee1604ade21bd7c264c29f17d864fc6eba9d7442c4",
     url = "http://www.frc971.org/Build-Dependencies/arm_frc_gnueabi_deps.tar.gz",
 )
 
-new_http_archive(
+http_archive(
     name = "python_gtk",
-    build_file = "debian/python_gtk.BUILD",
+    build_file = "@//debian:python_gtk.BUILD",
     sha256 = "850f5c1521b94c5c049c44d9107cd8ae9110696fbf054d2cb48bae9620fd4d23",
     url = "http://www.frc971.org/Build-Dependencies/python_gtk.tar.gz",
 )
 
 # Downloaded from
 # https://developer.arm.com/-/media/Files/downloads/gnu-rm/7-2018q2/gcc-arm-none-eabi-7-2018-q2-update-linux.tar.bz2?revision=bc2c96c0-14b5-4bb4-9f18-bceb4050fee7?product=GNU%20Arm%20Embedded%20Toolchain,64-bit,,Linux,7-2018-q2-update
-new_http_archive(
+http_archive(
     name = "gcc_arm_none_eabi",
-    build_file = "compilers/gcc_arm_none_eabi.BUILD",
+    build_file = "@//:compilers/gcc_arm_none_eabi.BUILD",
     sha256 = "bb17109f0ee697254a5d4ae6e5e01440e3ea8f0277f2e8169bf95d07c7d5fe69",
     strip_prefix = "gcc-arm-none-eabi-7-2018-q2-update/",
     url = "http://www.frc971.org/Build-Dependencies/gcc-arm-none-eabi-7-2018-q2-update-linux.tar.bz2",
 )
 
-new_http_archive(
+http_archive(
     name = "cgal_repo",
-    build_file = "debian/cgal.BUILD",
+    build_file = "@//debian:cgal.BUILD",
     sha256 = "d564dda558570344b4caa66c5bae2cdae9ef68e07829d64f5651b25f2c6a0e9e",
     url = "http://www.frc971.org/Build-Dependencies/cgal-dev-4.5-2.tar.gz",
 )
 
 # Java9 JDK.
-new_http_archive(
+http_archive(
     name = "openjdk_linux_archive",
     build_file_content = """
 java_runtime(
@@ -324,7 +327,7 @@
 )
 
 # Downloaded from http://devsite.ctr-electronics.com/maven/release/com/ctre/phoenix/api-cpp/5.14.1/.
-new_http_archive(
+http_archive(
     name = "ctre_phoenix_api_cpp_headers_2019",
     build_file_content = """
 cc_library(
@@ -340,7 +343,7 @@
 )
 
 # Downloaded from http://devsite.ctr-electronics.com/maven/release/com/ctre/phoenix/api-cpp/5.14.1/.
-new_http_archive(
+http_archive(
     name = "ctre_phoenix_api_cpp_athena_2019",
     build_file_content = """
 cc_library(
@@ -360,7 +363,7 @@
 )
 
 # Downloaded from http://devsite.ctr-electronics.com/maven/release/com/ctre/phoenix/cci/5.14.1/.
-new_http_archive(
+http_archive(
     name = "ctre_phoenix_cci_headers_2019",
     build_file_content = """
 cc_library(
@@ -376,7 +379,7 @@
 )
 
 # Downloaded from http://devsite.ctr-electronics.com/maven/release/com/ctre/phoenix/cci/5.14.1/.
-new_http_archive(
+http_archive(
     name = "ctre_phoenix_cci_athena_2019",
     build_file_content = """
 cc_library(
@@ -393,7 +396,7 @@
 )
 
 # Downloaded from http://devsite.ctr-electronics.com/maven/release/com/ctre/phoenix/core/5.14.1/.
-new_http_archive(
+http_archive(
     name = "ctre_phoenix_core_headers_2019",
     build_file_content = """
 cc_library(