diff --git a/git-hooks/pre-commit b/git-hooks/pre-commit
new file mode 100755
index 0000000..a5d91dc
--- /dev/null
+++ b/git-hooks/pre-commit
@@ -0,0 +1,4 @@
+#!/usr/bin/env bash
+
+echo -n "$(git branch --show-current)" > ./mach_nix/VERSION
+git add ./mach_nix/VERSION
diff --git a/shell.nix b/shell.nix
index 075107b..42a69f9 100644
--- a/shell.nix
+++ b/shell.nix
@@ -14,5 +14,6 @@ mkShell {
   ];
   shellHook = ''
     export PYTHONPATH=$(pwd)/
+    git config core.hooksPath ./git-hooks
   '';
 }