diff --git a/sdk/purescript/demo/bun.lockb b/sdk/purescript/demo/bun.lockb
index abb96ba..3381447 100755
Binary files a/sdk/purescript/demo/bun.lockb and b/sdk/purescript/demo/bun.lockb differ
diff --git a/sdk/purescript/demo/package.json b/sdk/purescript/demo/package.json
index ed83a41..169dc0b 100644
--- a/sdk/purescript/demo/package.json
+++ b/sdk/purescript/demo/package.json
@@ -9,6 +9,6 @@
     "typescript": "^5.0.0"
   },
   "dependencies": {
-    "@fluentci/sdk": "npm:@jsr/fluentci__sdk"
+    "@fluentci/sdk": "npm:@jsr/fluentci__sdk@0.4.3"
   }
 }
\ No newline at end of file
diff --git a/sdk/purescript/demo/packages.dhall b/sdk/purescript/demo/packages.dhall
index 0f003f6..42aace2 100644
--- a/sdk/purescript/demo/packages.dhall
+++ b/sdk/purescript/demo/packages.dhall
@@ -113,6 +113,6 @@ in  upstream
     , repo =
         "https://github.com/fluentci-io/purescript-fluentci.git"
     , version =
-        "d0d904915b1eade1f1e72ab541708ad4b43ccd5e"
+        "c0e9c1f6a0f769e3deec66eaf2e5a0c078ef8bb8"
     }
 
diff --git a/sdk/purescript/demo/src/Main.purs b/sdk/purescript/demo/src/Main.purs
index d05d075..79d1aff 100644
--- a/sdk/purescript/demo/src/Main.purs
+++ b/sdk/purescript/demo/src/Main.purs
@@ -6,11 +6,12 @@ import Effect (Effect)
 import Effect.Aff (launchAff_)
 import Effect.Class (liftEffect)
 import Effect.Class.Console as Console
-import FluentCI.Class (asService, id, mise, nix, pkgx, stdout, withExec, withSecretVariable, withService, withWorkdir)
+import FluentCI.Class (asService, id, mise, nix, pkgx, stdout, withExec, withSecretVariable, withService, withWorkdir, hermit)
 import FluentCI.Client (cache, dag, git, pipeline, setSecret)
 import FluentCI.Directory (Directory, entries)
 import FluentCI.Git (branch, tree)
-import FluentCI.Mise (Mise)
+import FluentCI.Hermit (Hermit)
+import FluentCI.Mise (Mise, trust)
 import FluentCI.Pipeline (Pipeline)
 import FluentCI.Pkgx (withPackages)
 import FluentCI.Secret (Secret, plaintext)
@@ -41,6 +42,9 @@ main = launchAff_ do
   gitEntries <- liftEffect $ gitEntriesDemo
   entries gitEntries >>= Console.debugShow
 
+  h <- liftEffect $ hermitDemo
+  stdout h >>= Console.log
+
 ping :: Effect Service
 ping = do
   p <- pipeline dag "demo"
@@ -69,8 +73,15 @@ miseDemo = do
   p <- pipeline dag "mise-demo"
   m <- mise p
   m1 <- withWorkdir m "./mise-demo"
-  m2 <- withExec m1 ["mise", "--version"]
-  withExec m2 ["which", "bun"]
+  m2 <- trust m1
+  m3 <- withExec m2 ["mise", "--version"]
+  withExec m3 ["which", "bun"]
+
+hermitDemo :: Effect Hermit
+hermitDemo = do
+  h <- hermit dag
+  h1 <- withWorkdir h "./hermit-demo"
+  withExec h1 ["which", "jq"]
 
 pingDemo :: Service -> Service -> Effect Pipeline
 pingDemo svc1 svc2 = do