diff --git a/util/bot/DEPS b/util/bot/DEPS
index ccaf75d..f433a58 100644
--- a/util/bot/DEPS
+++ b/util/bot/DEPS
@@ -14,21 +14,26 @@
 
 vars = {
   'chromium_git': 'https://chromium.googlesource.com',
+
+  # TODO(davidben): Switch this to False by default once the recipes configure it.
+  'checkout_clang': True,
+  # TODO(davidben): Switch this to False by default once the recipes configure it.
+  'checkout_fuzzer': 'checkout_linux',
+  'checkout_sde': False,
 }
 
 deps = {
+  'boringssl/util/bot/android_tools': {
+    'url': Var('chromium_git') + '/android_tools.git' + '@' + 'e9d4018e149d50172ed462a7c21137aa915940ec',
+    'condition': 'checkout_android',
+  },
+
   'boringssl/util/bot/gyp':
     Var('chromium_git') + '/external/gyp.git' + '@' + 'eb296f67da078ec01f5e3a9ea9cdc6d26d680161',
-}
 
-deps_os = {
-  'android': {
-    'boringssl/util/bot/android_tools':
-      Var('chromium_git') + '/android_tools.git' + '@' + 'e9d4018e149d50172ed462a7c21137aa915940ec',
-  },
-  'unix': {
-    'boringssl/util/bot/libFuzzer':
-      Var('chromium_git') + '/chromium/llvm-project/llvm/lib/Fuzzer.git' + '@' + '16f5f743c188c836d32cdaf349d5d3effb8a3518',
+  'boringssl/util/bot/libFuzzer': {
+    'url': Var('chromium_git') + '/chromium/llvm-project/llvm/lib/Fuzzer.git' + '@' + '16f5f743c188c836d32cdaf349d5d3effb8a3518',
+    'condition': 'checkout_fuzzer',
   },
 }
 
@@ -41,6 +46,7 @@
   {
     'name': 'cmake_linux64',
     'pattern': '.',
+    'condition': 'host_os == "linux"',
     'action': [ 'download_from_google_storage',
                 '--no_resume',
                 '--platform=linux*',
@@ -50,8 +56,19 @@
     ],
   },
   {
+    'name': 'cmake_linux64_extract',
+    'pattern': '.',
+    'condition': 'host_os == "linux"',
+    'action': [ 'python',
+                'boringssl/util/bot/extract.py',
+                'boringssl/util/bot/cmake-linux64.tar.gz',
+                'boringssl/util/bot/cmake-linux64/',
+    ],
+  },
+  {
     'name': 'cmake_mac',
     'pattern': '.',
+    'condition': 'host_os == "mac"',
     'action': [ 'download_from_google_storage',
                 '--no_resume',
                 '--platform=darwin',
@@ -61,8 +78,19 @@
     ],
   },
   {
+    'name': 'cmake_mac_extract',
+    'pattern': '.',
+    'condition': 'host_os == "mac"',
+    'action': [ 'python',
+                'boringssl/util/bot/extract.py',
+                'boringssl/util/bot/cmake-mac.tar.gz',
+                'boringssl/util/bot/cmake-mac/',
+    ],
+  },
+  {
     'name': 'cmake_win32',
     'pattern': '.',
+    'condition': 'host_os == "win"',
     'action': [ 'download_from_google_storage',
                 '--no_resume',
                 '--platform=win32',
@@ -72,8 +100,19 @@
     ],
   },
   {
+    'name': 'cmake_win32_extract',
+    'pattern': '.',
+    'condition': 'host_os == "win"',
+    'action': [ 'python',
+                'boringssl/util/bot/extract.py',
+                'boringssl/util/bot/cmake-win32.zip',
+                'boringssl/util/bot/cmake-win32/',
+    ],
+  },
+  {
     'name': 'perl_win32',
     'pattern': '.',
+    'condition': 'host_os == "win"',
     'action': [ 'download_from_google_storage',
                 '--no_resume',
                 '--platform=win32',
@@ -83,8 +122,20 @@
     ],
   },
   {
+    'name': 'perl_win32_extract',
+    'pattern': '.',
+    'condition': 'host_os == "win"',
+    'action': [ 'python',
+                'boringssl/util/bot/extract.py',
+                '--no-prefix',
+                'boringssl/util/bot/perl-win32.zip',
+                'boringssl/util/bot/perl-win32/',
+    ],
+  },
+  {
     'name': 'yasm_win32',
     'pattern': '.',
+    'condition': 'host_os == "win"',
     'action': [ 'download_from_google_storage',
                 '--no_resume',
                 '--platform=win32',
@@ -96,6 +147,7 @@
   {
     'name': 'win_toolchain',
     'pattern': '.',
+    'condition': 'host_os == "win"',
     'action': [ 'python',
                 'boringssl/util/bot/vs_toolchain.py',
                 'update',
@@ -104,45 +156,29 @@
   {
     'name': 'clang',
     'pattern': '.',
+    'condition': 'checkout_clang',
     'action': [ 'python',
                 'boringssl/util/bot/update_clang.py',
     ],
   },
   {
-    'name': 'cmake_linux64_extract',
+    'name': 'sde_linux64',
     'pattern': '.',
-    'action': [ 'python',
-                'boringssl/util/bot/extract.py',
-                'boringssl/util/bot/cmake-linux64.tar.gz',
-                'boringssl/util/bot/cmake-linux64/',
+    'condition': 'checkout_sde and host_os == "linux"',
+    'action': [ 'download_from_google_storage',
+                '--no_resume',
+                '--bucket', 'chrome-boringssl-sde',
+                '-s', 'boringssl/util/bot/sde-linux64.tar.bz2.sha1'
     ],
   },
   {
-    'name': 'cmake_mac_extract',
+    'name': 'sde_linux64_extract',
     'pattern': '.',
+    'condition': 'checkout_sde and host_os == "linux"',
     'action': [ 'python',
                 'boringssl/util/bot/extract.py',
-                'boringssl/util/bot/cmake-mac.tar.gz',
-                'boringssl/util/bot/cmake-mac/',
-    ],
-  },
-  {
-    'name': 'cmake_win32_extract',
-    'pattern': '.',
-    'action': [ 'python',
-                'boringssl/util/bot/extract.py',
-                'boringssl/util/bot/cmake-win32.zip',
-                'boringssl/util/bot/cmake-win32/',
-    ],
-  },
-  {
-    'name': 'perl_win32_extract',
-    'pattern': '.',
-    'action': [ 'python',
-                'boringssl/util/bot/extract.py',
-                '--no-prefix',
-                'boringssl/util/bot/perl-win32.zip',
-                'boringssl/util/bot/perl-win32/',
+                'boringssl/util/bot/sde-linux64.tar.bz2',
+                'boringssl/util/bot/sde-linux64/',
     ],
   },
 ]