diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a2a2dd8..e60e895 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -27,3 +27,4 @@ jobs:
       - name: Show cmake version
         run: |
           devbox run cmake --version
+        working-directory: build
diff --git a/src/helpers.rs b/src/helpers.rs
index e8f471e..35f90af 100644
--- a/src/helpers.rs
+++ b/src/helpers.rs
@@ -2,10 +2,13 @@ use anyhow::Error;
 use fluentci_pdk::dag;
 
 pub fn setup_cmake(version: &str) -> Result<String, Error> {
+    dag()
+        .pkgx()?
+        .with_exec(vec!["mkdir", "-p", "build"])?
+        .stdout()?;
+
     let stdout = dag()
         .devbox()?
-        .with_exec(vec!["mkdir", "-p", "build"])?
-        .with_exec(vec!["cp", "devbox.*", "build/"])?
         .with_workdir("build")?
         .with_exec(vec!["devbox", "add", &format!("cmake@{}", version)])?
         .with_exec(vec!["devbox", "install"])?