diff --git a/pkgs/tb-scripts/default.nix b/pkgs/tb-scripts/default.nix
index a6efd3c..7a048f1 100644
--- a/pkgs/tb-scripts/default.nix
+++ b/pkgs/tb-scripts/default.nix
@@ -20,5 +20,10 @@ pkgs.symlinkJoin {
       runtimeInputs = [ pkgs.zip ];
       text = builtins.readFile ./zipdir;
     })
+    (pkgs.writeShellApplication {
+      name = ",split-1G";
+      runtimeInputs = [ pkgs.coreutils ];
+      text = builtins.readFile ./split-1G;
+    })
   ];
 }
diff --git a/pkgs/tb-scripts/split-1G b/pkgs/tb-scripts/split-1G
new file mode 100755
index 0000000..f0e4d1f
--- /dev/null
+++ b/pkgs/tb-scripts/split-1G
@@ -0,0 +1,7 @@
+#!/bin/sh
+
+set -e
+
+for f in "$@"; do
+    split --verbose --suffix-length=5 --bytes=1G --numeric-suffixes "$f" "$f."
+done