diff --git a/.ci/esy-build-steps.yml b/.ci/esy-build-steps.yml
index 07630b9..21bb377 100644
--- a/.ci/esy-build-steps.yml
+++ b/.ci/esy-build-steps.yml
@@ -4,6 +4,7 @@ steps:
   - task: NodeTool@0
     inputs:
       versionSpec: '8.9'
+  - template: ./use-cache-esy.yml
   - script: npm i -g esy
   - script: npm install
   - script: npm run build-exe
diff --git a/.ci/use-cache-esy.yml b/.ci/use-cache-esy.yml
new file mode 100644
index 0000000..d65ecd5
--- /dev/null
+++ b/.ci/use-cache-esy.yml
@@ -0,0 +1,19 @@
+---
+steps:
+  - task: Cache@2
+    inputs:
+      key: 'v1 | esy-install-cache | "$(Agent.OS)" | "$(Build.SourcesDirectory)/esy.lock/index.json"' # vPrimary, here, is just a way to bust cache during debugging. Inspired from https://docs.microsoft.com/en-us/azure/devops/pipelines/caching/?view=azure-devops#can-i-clear-a-cache" 
+      restoreKeys: |
+        v1 | esy-install-cache | ${{ parameters.platform }}
+      path: $(ESY__CACHE_INSTALL_PATH)
+      cacheHitVar: ESY_INSTALL_CACHE_RESTORED
+    displayName:  "Caching $(ESY__CACHE_INSTALL_PATH)"
+  - task: Cache@2
+    inputs:
+      key: 'v1 | esy-sources | "$(Agent.OS)" | "$(Build.SourcesDirectory)/esy.lock/index.json"' # vPrimary, here, is just a way to bust cache during debugging. Inspired from https://docs.microsoft.com/en-us/azure/devops/pipelines/caching/?view=azure-devops#can-i-clear-a-cache" 
+      restoreKeys: |
+          v1 | esy-sources | "$(Agent.OS)"
+          v1 | esy-sources
+      path: "$(ESY__CACHE_INSTALL_PATH)/../../source"
+      cacheHitVar: ESY_SOURCE_CACHE_RESTORED
+    displayName:  "Caching $(ESY__CACHE_INSTALL_PATH)/../../source"