diff --git a/custom-pkgs/default.nix b/custom-pkgs/default.nix
index 1d9d5bd..597cb68 100644
--- a/custom-pkgs/default.nix
+++ b/custom-pkgs/default.nix
@@ -3,6 +3,7 @@ pkgs: {
   sl = import ./sl { inherit pkgs; };
   run = import ./run { inherit pkgs; };
   unpem = import ./unpem { inherit pkgs; };
+  flash-glove80 = import ./flash-glove80 { inherit pkgs; };
   u = import ./u { inherit pkgs; };
   x = import ./x { inherit pkgs; };
 }
diff --git a/custom-pkgs/flash-glove80/default.nix b/custom-pkgs/flash-glove80/default.nix
new file mode 100644
index 0000000..1aed51b
--- /dev/null
+++ b/custom-pkgs/flash-glove80/default.nix
@@ -0,0 +1,4 @@
+{ pkgs }: pkgs.writeShellApplication {
+  name = "flash-glove80";
+  text = builtins.readFile ./flash.sh;
+}
diff --git a/custom-pkgs/flash-glove80/flash.sh b/custom-pkgs/flash-glove80/flash.sh
new file mode 100644
index 0000000..dccfc48
--- /dev/null
+++ b/custom-pkgs/flash-glove80/flash.sh
@@ -0,0 +1,65 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+# shellcheck disable=SC2012
+image=$(ls "$HOME"/Downloads/*.uf2 --sort time | head -n1)
+image_mtime=$(stat "$image" --format "%y")
+
+echo "flashing $image, last modified $image_mtime"
+
+read -rp "is this correct? (y/n) "
+if [[ ! $REPLY =~ ^[Yy]$ ]]; then
+  exit 1
+fi
+
+echo "prompting sudo password once to avoid needing to type it again"
+sudo true
+
+wait_until_present() {
+  local file="$1"
+  local side_descr="$2"
+  local keys="$3"
+
+  while [ ! -e "$file" ]; do
+    echo "Glove80 $side_descr not connected, re-start it with $keys pressed"
+    sleep 5
+  done
+
+  echo "$side_descr is connected"
+}
+
+flash_side() {
+  local disk="$1"
+  local side_descr="$2"
+
+  if [ ! -e "$disk" ]; then
+  	echo "$disk is missing, boot the glove80 while pressing PgDn+I"
+	  exit 1
+  fi
+
+  local mountpoint
+  mountpoint=$(mktemp -d)
+
+  echo "mounting $disk at $mountpoint" 
+  sudo mount "$disk" "$mountpoint"
+  echo "copying $image to $side_descr"
+  sudo cp "$image" "$mountpoint/CURRENT.UF2"
+  echo "done flashing $side_descr"
+}
+
+wait_and_flash() {
+  local side_shorthand="$1"
+  local side_descr="$2"
+  local keys="$3"
+  
+  local disk="/dev/disk/by-label/GLV80${side_shorthand}BOOT"
+
+  wait_until_present "$disk" "$side_descr" "$keys"
+  flash_side "$disk" "$side_descr"
+}
+
+wait_and_flash "RH" "right-hand side" "PgDn+I"
+wait_and_flash "LH" "left-hand side" "Magic+E"
+
+echo "done flashing!"
diff --git a/home-manager/home.nix b/home-manager/home.nix
index c3a281e..c6dd254 100644
--- a/home-manager/home.nix
+++ b/home-manager/home.nix
@@ -47,6 +47,7 @@ in
     customPkgs.cargo-bisect-rustc
     customPkgs.run
     customPkgs.unpem
+    customPkgs.flash-glove80
     discord
     obsidian
     prismlauncher