diff --git a/.travis.yml b/.travis.yml
index ce6ae75..b8f0818 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -19,50 +19,7 @@ script: |
     cachix authtoken "$CACHIX_AUTH_TOKEN"
   fi
 
-  # build an rpi0 sample image
-  nix-build . \
-    --cores 2 \
-    --max-jobs 2 \
-    --no-build-output \
-    -I nixpkgs=nixpkgs \
-    -I machine=machines/raspberrypi-zerow \
-    -I image=images/rpi0-otg-ether
-
-  # push rpi0 with permission
-  if [[ ${CACHIX_AUTH_TOKEN:-} ]]; then
-    cachix push cross-armed $(readlink -f result)
-    cachix push cross-armed $(nix-store -qd result)
-  fi
-
-  # build a beaglebone sample image
-  nix-build . \
-    --cores 2 \
-    --max-jobs 2 \
-    --no-build-output \
-    -I nixpkgs=nixpkgs \
-    -I machine=machines/beaglebone \
-    -I image=images/mini
-
-  # push beaglebone with permission
-  if [[ ${CACHIX_AUTH_TOKEN:-} ]]; then
-    cachix push cross-armed $(readlink -f result)
-    cachix push cross-armed $(nix-store -qd result)
-  fi
-
-  # build a toradex apalis imx6 sample image
-  nix-build . \
-    --cores 2 \
-    --max-jobs 2 \
-    --no-build-output \
-    -I nixpkgs=nixpkgs \
-    -I machine=machines/toradex_apalis_imx6 \
-    -I image=images/mini
-
-  # push toradex apalis imx6 with permission
-  if [[ ${CACHIX_AUTH_TOKEN:-} ]]; then
-    cachix push cross-armed $(readlink -f result)
-    cachix push cross-armed $(nix-store -qd result)
-  fi
+  ./update-cachix.sh
 
   # kill the background process
   kill %1
diff --git a/update-cachix.sh b/update-cachix.sh
new file mode 100755
index 0000000..ca58436
--- /dev/null
+++ b/update-cachix.sh
@@ -0,0 +1,26 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+function build_n_push() {
+    local machine="$1"
+    local image="$2"
+
+    nix-build . \
+              --no-build-output \
+              -I nixpkgs=nixpkgs \
+              -I machine="$machine" \
+              -I image="$image"
+
+    if [[ ${CACHIX_AUTH_TOKEN:-} ]]; then
+        cachix push cross-armed $(readlink -f result)
+        cachix push cross-armed $(nix-store -qd result)
+    fi
+}
+
+build_n_push machines/raspberrypi-zerow images/mini
+build_n_push machines/raspberrypi-zero  images/mini
+build_n_push machines/raspberrypi-2     images/mini
+build_n_push machines/raspberrypi-3     images/mini
+build_n_push machines/beaglebone        images/mini
+build_n_push machines/odroid-c2         images/mini
+