diff --git a/.tangled/workflows/build.yml b/.tangled/workflows/build.yml
index 3eba0095..02651e4b 100644
--- a/.tangled/workflows/build.yml
+++ b/.tangled/workflows/build.yml
@@ -2,12 +2,12 @@ when:
   - event: ["push", "pull_request"]
     branch: master
 
-engine: nixery
+engine: microvm
+image: nixos
 
 dependencies:
-  nixpkgs:
-    - go
-    - gcc
+  - go
+  - gcc
 
 environment:
   CGO_ENABLED: 1
@@ -15,16 +15,16 @@ environment:
 steps:
   - name: patch static dir
     command: |
-       mkdir -p appview/pages/static; touch appview/pages/static/x
+      mkdir -p appview/pages/static; touch appview/pages/static/x
 
   - name: build appview
     command: |
-       go build -o appview.out ./cmd/appview
+      go build -o appview.out ./cmd/appview
 
   - name: build knot
     command: |
-       go build -o knot.out ./cmd/knot
+      go build -o knot.out ./cmd/knot
 
   - name: build spindle
     command: |
-       go build -o spindle.out ./cmd/spindle
+      go build -o spindle.out ./cmd/spindle
diff --git a/.tangled/workflows/deploy-blog.yml b/.tangled/workflows/deploy-blog.yml
index 7bcc4f43..1e11a3e2 100644
--- a/.tangled/workflows/deploy-blog.yml
+++ b/.tangled/workflows/deploy-blog.yml
@@ -1,14 +1,15 @@
-engine: nixery
 when:
   - event: push
     branch: master
 
+engine: microvm
+image: nixos
+
 dependencies:
-  nixpkgs:
-    - go
-    - gcc
-    - nodejs
-    - tailwindcss
+  - go
+  - gcc
+  - nodejs
+  - tailwindcss
 
 steps:
   - name: patch static dir
diff --git a/.tangled/workflows/fmt.yml b/.tangled/workflows/fmt.yml
index eb964281..a68885e2 100644
--- a/.tangled/workflows/fmt.yml
+++ b/.tangled/workflows/fmt.yml
@@ -2,7 +2,8 @@ when:
   - event: ["push", "pull_request"]
     branch: master
 
-engine: nixery
+engine: microvm
+image: alpine
 
 steps:
   - name: "Check formatting"
diff --git a/.tangled/workflows/test.yml b/.tangled/workflows/test.yml
index 69a1b62c..9b743678 100644
--- a/.tangled/workflows/test.yml
+++ b/.tangled/workflows/test.yml
@@ -2,12 +2,15 @@ when:
   - event: ["push", "pull_request"]
     branch: master
 
-engine: nixery
+engine: microvm
+image: nixos
 
 dependencies:
-  nixpkgs:
-    - go
-    - gcc
+  - go
+  - gcc
+
+environment:
+  CGO_ENABLED: 1
 
 steps:
   - name: patch static dir
@@ -15,13 +18,9 @@ steps:
       mkdir -p appview/pages/static; touch appview/pages/static/x
 
   - name: run linter
-    environment:
-      CGO_ENABLED: 1
     command: |
       go vet -v ./...
 
   - name: run all tests
-    environment:
-      CGO_ENABLED: 1
     command: |
       go test -v ./...