diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 445f5257da..91113b686f 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -4,6 +4,9 @@ on:
   workflow_dispatch:
   push:
 
+env:
+  DISABLE_KNAPSACK: true
+
 jobs:
   test-models:
     runs-on: ubuntu-18.04
diff --git a/Rakefile b/Rakefile
index 045e002991..f7fce19311 100755
--- a/Rakefile
+++ b/Rakefile
@@ -8,4 +8,6 @@ require_relative 'config/application'
 
 Openfoodnetwork::Application.load_tasks
 
-Knapsack.load_tasks if defined?(Knapsack)
+unless ENV['DISABLE_KNAPSACK']
+  Knapsack.load_tasks if defined?(Knapsack)
+end