diff --git a/resources/celerity/map.php b/resources/celerity/map.php
--- a/resources/celerity/map.php
+++ b/resources/celerity/map.php
@@ -10,7 +10,7 @@
     'conpherence.pkg.css' => '0e3cf785',
     'conpherence.pkg.js' => '020aebcf',
     'core.pkg.css' => 'f538846d',
-    'core.pkg.js' => '6a2c22c2',
+    'core.pkg.js' => '66c49ca1',
     'dark-console.pkg.js' => '187792c2',
     'differential.pkg.css' => '609e63d4',
     'differential.pkg.js' => 'c60bec1b',
@@ -257,7 +257,7 @@
     'rsrc/externals/javelin/lib/URI.js' => '2e255291',
     'rsrc/externals/javelin/lib/Vector.js' => 'e9c80beb',
     'rsrc/externals/javelin/lib/WebSocket.js' => 'fdc13e4e',
-    'rsrc/externals/javelin/lib/Workflow.js' => 'd7ba6915',
+    'rsrc/externals/javelin/lib/Workflow.js' => 'cc1553f3',
     'rsrc/externals/javelin/lib/__tests__/Cookie.js' => 'ca686f71',
     'rsrc/externals/javelin/lib/__tests__/DOM.js' => '4566e249',
     'rsrc/externals/javelin/lib/__tests__/JSON.js' => '710377ae',
@@ -265,7 +265,7 @@
     'rsrc/externals/javelin/lib/__tests__/behavior.js' => '8426ebeb',
     'rsrc/externals/javelin/lib/behavior.js' => '1b6acc2a',
     'rsrc/externals/javelin/lib/control/tokenizer/Tokenizer.js' => '89a1ae3a',
-    'rsrc/externals/javelin/lib/control/typeahead/Typeahead.js' => 'd96e47a4',
+    'rsrc/externals/javelin/lib/control/typeahead/Typeahead.js' => '0507519c',
     'rsrc/externals/javelin/lib/control/typeahead/normalizer/TypeaheadNormalizer.js' => 'a241536a',
     'rsrc/externals/javelin/lib/control/typeahead/source/TypeaheadCompositeSource.js' => '22ee68a5',
     'rsrc/externals/javelin/lib/control/typeahead/source/TypeaheadOnDemandSource.js' => '23387297',
@@ -423,7 +423,7 @@
     'rsrc/js/application/projects/WorkboardCard.js' => '0392a5d8',
     'rsrc/js/application/projects/WorkboardCardTemplate.js' => '84f82dad',
     'rsrc/js/application/projects/WorkboardColumn.js' => 'c3d24e63',
-    'rsrc/js/application/projects/WorkboardController.js' => 'b9d0c2f3',
+    'rsrc/js/application/projects/WorkboardController.js' => '7474d31f',
     'rsrc/js/application/projects/WorkboardDropEffect.js' => '8e0aa661',
     'rsrc/js/application/projects/WorkboardHeader.js' => '111bfd2d',
     'rsrc/js/application/projects/WorkboardHeaderTemplate.js' => 'ebe83a6b',
@@ -453,7 +453,7 @@
     'rsrc/js/core/DragAndDropFileUpload.js' => '4370900d',
     'rsrc/js/core/DraggableList.js' => '0169e425',
     'rsrc/js/core/Favicon.js' => '7930776a',
-    'rsrc/js/core/FileUpload.js' => 'ab85e184',
+    'rsrc/js/core/FileUpload.js' => '331676ea',
     'rsrc/js/core/Hovercard.js' => '6199f752',
     'rsrc/js/core/HovercardList.js' => 'de4b4919',
     'rsrc/js/core/KeyboardShortcut.js' => '1a844c06',
@@ -731,7 +731,7 @@
     'javelin-sound' => 'd4cc2d2a',
     'javelin-stratcom' => '0889b835',
     'javelin-tokenizer' => '89a1ae3a',
-    'javelin-typeahead' => 'd96e47a4',
+    'javelin-typeahead' => '0507519c',
     'javelin-typeahead-composite-source' => '22ee68a5',
     'javelin-typeahead-normalizer' => 'a241536a',
     'javelin-typeahead-ondemand-source' => '23387297',
@@ -751,12 +751,12 @@
     'javelin-workboard-card' => '0392a5d8',
     'javelin-workboard-card-template' => '84f82dad',
     'javelin-workboard-column' => 'c3d24e63',
-    'javelin-workboard-controller' => 'b9d0c2f3',
+    'javelin-workboard-controller' => '7474d31f',
     'javelin-workboard-drop-effect' => '8e0aa661',
     'javelin-workboard-header' => '111bfd2d',
     'javelin-workboard-header-template' => 'ebe83a6b',
     'javelin-workboard-order-template' => '03e8891f',
-    'javelin-workflow' => 'd7ba6915',
+    'javelin-workflow' => 'cc1553f3',
     'maniphest-report-css' => '3d53188b',
     'maniphest-task-edit-css' => '272daa84',
     'maniphest-task-summary-css' => '61d1667e',
@@ -787,7 +787,7 @@
     'phabricator-fatal-config-template-css' => 'e689dbbd',
     'phabricator-favicon' => '7930776a',
     'phabricator-feed-css' => 'd8b6e3f8',
-    'phabricator-file-upload' => 'ab85e184',
+    'phabricator-file-upload' => '331676ea',
     'phabricator-flag-css' => '2b77be8d',
     'phabricator-keyboard-shortcut' => '1a844c06',
     'phabricator-keyboard-shortcut-manager' => '81debc48',
@@ -965,6 +965,12 @@
       'javelin-dom',
       'javelin-workflow',
     ),
+    '0507519c' => array(
+      'javelin-install',
+      'javelin-dom',
+      'javelin-vector',
+      'javelin-util',
+    ),
     '05d290ef' => array(
       'javelin-install',
       'javelin-util',
@@ -1207,6 +1213,11 @@
       'javelin-stratcom',
       'javelin-dom',
     ),
+    '331676ea' => array(
+      'javelin-install',
+      'javelin-dom',
+      'phabricator-notification',
+    ),
     34450586 => array(
       'javelin-color',
       'javelin-install',
@@ -1589,6 +1600,16 @@
       'javelin-behavior',
       'javelin-dom',
     ),
+    '7474d31f' => array(
+      'javelin-install',
+      'javelin-dom',
+      'javelin-util',
+      'javelin-vector',
+      'javelin-stratcom',
+      'javelin-workflow',
+      'phabricator-drag-and-drop-file-upload',
+      'javelin-workboard-board',
+    ),
     '78bc5d94' => array(
       'javelin-behavior',
       'javelin-uri',
@@ -1856,11 +1877,6 @@
       'javelin-json',
       'phuix-form-control-view',
     ),
-    'ab85e184' => array(
-      'javelin-install',
-      'javelin-dom',
-      'phabricator-notification',
-    ),
     'ac10c917' => array(
       'javelin-behavior',
       'javelin-dom',
@@ -1983,16 +1999,6 @@
       'javelin-uri',
       'phabricator-notification',
     ),
-    'b9d0c2f3' => array(
-      'javelin-install',
-      'javelin-dom',
-      'javelin-util',
-      'javelin-vector',
-      'javelin-stratcom',
-      'javelin-workflow',
-      'phabricator-drag-and-drop-file-upload',
-      'javelin-workboard-board',
-    ),
     'bf159129' => array(
       'phui-inline-comment-view-css',
     ),
@@ -2034,6 +2040,17 @@
       'javelin-workflow',
       'javelin-json',
     ),
+    'cc1553f3' => array(
+      'javelin-stratcom',
+      'javelin-request',
+      'javelin-dom',
+      'javelin-vector',
+      'javelin-install',
+      'javelin-util',
+      'javelin-mask',
+      'javelin-uri',
+      'javelin-routable',
+    ),
     'cc2c5de5' => array(
       'javelin-install',
       'phuix-button-view',
@@ -2063,17 +2080,6 @@
     'd4cc2d2a' => array(
       'javelin-install',
     ),
-    'd7ba6915' => array(
-      'javelin-stratcom',
-      'javelin-request',
-      'javelin-dom',
-      'javelin-vector',
-      'javelin-install',
-      'javelin-util',
-      'javelin-mask',
-      'javelin-uri',
-      'javelin-routable',
-    ),
     'd7d3ba75' => array(
       'javelin-dom',
       'javelin-util',
@@ -2094,12 +2100,6 @@
       'javelin-util',
       'phabricator-shaped-request',
     ),
-    'd96e47a4' => array(
-      'javelin-install',
-      'javelin-dom',
-      'javelin-vector',
-      'javelin-util',
-    ),
     'da15d3dc' => array(
       'phui-oi-list-view-css',
     ),
diff --git a/src/applications/config/check/PhabricatorBinariesSetupCheck.php b/src/applications/config/check/PhabricatorBinariesSetupCheck.php
--- a/src/applications/config/check/PhabricatorBinariesSetupCheck.php
+++ b/src/applications/config/check/PhabricatorBinariesSetupCheck.php
@@ -104,7 +104,17 @@
 
       switch ($vcs['versionControlSystem']) {
         case PhabricatorRepositoryType::REPOSITORY_TYPE_GIT:
-          $bad_versions = array();
+          $bad_versions = array(
+            // We need 2.5.0 to use "git cat-file -t -- <hash>:<file>"
+            // https://we.phorge.it/T15179
+            '< 2.5.0' => pht(
+              'The minimum supported version of Git on the server is %s, '.
+              'which was released in %s. In older versions, the Git server '.
+              'may not be able to escape arguments with the "--" operator. '.
+              'Note that your Git clients do not require a particular version.',
+              '2.5.0',
+              '2015'),
+          );
           break;
         case PhabricatorRepositoryType::REPOSITORY_TYPE_SVN:
           $bad_versions = array(