diff --git a/compose.dang b/compose.dang
index 3c008ee..aaa22f6 100644
--- a/compose.dang
+++ b/compose.dang
@@ -27,40 +27,13 @@ type Compose {
   prefix marks an enclosing project.
   """
   pub projects(ws: Workspace!): [ComposeProject!]! {
-    polyfill
-      .workspace(ws)
-      .findConfigDirs(configNames)
+    ws
+      .findRoots(markers: configNames)
       .map { projectPath =>
         ComposeProject(path: projectPath, composeImage: composeImage, configNames: configNames)
       }
   }
 
-
-  """
-  Return the number of path segments of a workspace-root-absolute file path.
-  """
-  let depth(filePath: String!): Int! {
-    filePath.trimPrefix("/").split("/").length
-  }
-
-  """
-  Return the directory of a workspace-root-absolute file path, relative to the
-  client's cwd: "/a/b/compose.yaml" from cwd "a" is "b", from "a/b/c" is "..".
-  """
-  let relativeToCwd(ws: Workspace!, filePath: String!): String! {
-    let dirSegments = filePath.trimPrefix("/").split("/").dropLast(1)
-    let cwdSegments = ws.path.trimPrefix("/").split("/").filter { segment =>
-      segment != "" and segment != "."
-    }
-    # Longest common prefix: acc only advances while every prior segment matched.
-    let common = cwdSegments.map { segment, i => i }.reduce(0) { acc, i =>
-      if (acc == i and dirSegments[i] == cwdSegments[i]) { acc + 1 } else { acc }
-    }
-    let segments = cwdSegments.dropFirst(common).map { segment => ".." } +
-      dirSegments.dropFirst(common)
-    if (segments.length == 0) { "." } else { segments.join("/") }
-  }
-
   """
   Run the services of the Compose project detected from the client's cwd,
   proxied through a single service with one frontend port per compose service.
diff --git a/dagger.json b/dagger.json
index 57524f1..af53617 100644
--- a/dagger.json
+++ b/dagger.json
@@ -1,18 +1,14 @@
 {
   "name": "docker",
-  "engineVersion": "v0.20.6",
+  "engineVersion": "v1.0.0-beta.10",
   "sdk": {
     "source": "dang"
   },
   "dependencies": [
-    {
-      "name": "polyfill",
-      "source": "github.com/dagger/polyfill@main",
-      "pin": "ec3ea84a2351b4beb06ecece951f2e5ef66509ff"
-    },
     {
       "name": "proxy",
-      "source": "./proxy"
+      "source": "https://github.com/dagger/proxy@main",
+      "pin": "3224e8981d8c8f04a0c238dc933b7415a2a6349f"
     }
   ]
-}
\ No newline at end of file
+}
diff --git a/docker.dang b/docker.dang
index 8af9f78..21b90b2 100644
--- a/docker.dang
+++ b/docker.dang
@@ -17,9 +17,8 @@ type Docker {
   marks an enclosing project.
   """
   pub projects(ws: Workspace!): [DockerProject!]! {
-    polyfill
-      .workspace(ws)
-      .findConfigDirs(["Dockerfile"])
+    ws
+      .findRoots(markers: ["Dockerfile"])
       .map { projectPath =>
         DockerProject(path: projectPath, lintImage: lintImage)
       }
@@ -53,7 +52,7 @@ type Docker {
   """
   let relativeToCwd(ws: Workspace!, filePath: String!): String! {
     let dirSegments = filePath.trimPrefix("/").split("/").dropLast(1)
-    let cwdSegments = ws.path.trimPrefix("/").split("/").filter { segment =>
+    let cwdSegments = ws.cwd.trimPrefix("/").split("/").filter { segment =>
       segment != "" and segment != "."
     }
     # Longest common prefix: acc only advances while every prior segment matched.