diff --git a/crates/pkgs/src/homebrew.rs b/crates/pkgs/src/homebrew.rs
index a2354d9..fd96e69 100644
--- a/crates/pkgs/src/homebrew.rs
+++ b/crates/pkgs/src/homebrew.rs
@@ -8,18 +8,29 @@ impl Homebrew {
     pub fn new() -> Self {
         Self {}
     }
-}
 
-impl PackageManager for Homebrew {
-    fn install(&self, name: &str) -> Result<(), Error> {
-        self.setup()?;
-        let mut child = Command::new("sh")
+    pub fn create_install_command(&self, name: &str) -> Command {
+        let mut command = Command::new("sh");
+        command
             .arg("-c")
             .arg(format!("brew install {}", name))
             .stdin(Stdio::inherit())
             .stdout(Stdio::inherit())
-            .stderr(Stdio::inherit())
-            .spawn()?;
+            .stderr(Stdio::inherit());
+        command
+    }
+}
+
+impl Default for Homebrew {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
+impl PackageManager for Homebrew {
+    fn install(&self, name: &str) -> Result<(), Error> {
+        self.setup()?;
+        let mut child = self.create_install_command(name).spawn()?;
         child.wait()?;
         Ok(())
     }
@@ -56,3 +67,41 @@ impl PackageManager for Homebrew {
         Ok(())
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_create_child_command_with_version() {
+        let homebrew = Homebrew::new();
+        let command = homebrew.create_install_command("neovim@0.9.5");
+        assert_eq!(command.get_args().len(), 2);
+        assert_eq!(
+            command.get_args().last().unwrap().to_string_lossy(),
+            "brew install neovim@0.9.5"
+        );
+    }
+
+    #[test]
+    fn test_create_child_command_without_version() {
+        let homebrew = Homebrew::new();
+        let command = homebrew.create_install_command("neovim");
+        assert_eq!(command.get_args().len(), 2);
+        assert_eq!(
+            command.get_args().last().unwrap().to_string_lossy(),
+            "brew install neovim"
+        );
+    }
+
+    #[test]
+    fn test_create_child_command_with_head() {
+        let homebrew = Homebrew::new();
+        let command = homebrew.create_install_command("neovim --HEAD");
+        assert_eq!(command.get_args().len(), 2);
+        assert_eq!(
+            command.get_args().last().unwrap().to_string_lossy(),
+            "brew install neovim --HEAD"
+        );
+    }
+}
diff --git a/demo/envhub.hcl b/demo/envhub.hcl
index 2f4981d..ae91312 100644
--- a/demo/envhub.hcl
+++ b/demo/envhub.hcl
@@ -6,6 +6,12 @@ envs {
   EDITOR = "vim"
 }
 
+homebrew {
+  packages = [
+    "neovim --HEAD"
+  ]
+}
+
 file ".screenrc" {
   source = "dotfiles/.screenrc"
 }
@@ -18,4 +24,4 @@ file ".gradle/gradle.properties" {
   content = "org.gradle.daemon=true"
 }
 
-secrets = ["CLOUDFLARE_ROOT_KEY"]
\ No newline at end of file
+secrets = ["CLOUDFLARE_ROOT_KEY"]
diff --git a/devbox.json b/devbox.json
new file mode 100644
index 0000000..e0ed601
--- /dev/null
+++ b/devbox.json
@@ -0,0 +1,11 @@
+{
+  "packages": ["rustup@latest", "libiconv@latest"],
+  "shell": {
+    "init_hook": ["rustup default stable", "cargo fetch"],
+    "scripts": {
+      "test": "cargo test -- --show-output",
+      "start": "cargo run",
+      "build-docs": "cargo doc"
+    }
+  }
+}
diff --git a/devbox.lock b/devbox.lock
new file mode 100644
index 0000000..853f76a
--- /dev/null
+++ b/devbox.lock
@@ -0,0 +1,82 @@
+{
+  "lockfile_version": "1",
+  "packages": {
+    "libiconv@latest": {
+      "last_modified": "2024-03-22T11:26:23Z",
+      "resolved": "github:NixOS/nixpkgs/a3ed7406349a9335cb4c2a71369b697cecd9d351#libiconv",
+      "source": "devbox-search",
+      "version": "2.38",
+      "systems": {
+        "aarch64-linux": {
+          "outputs": [
+            {
+              "name": "out",
+              "path": "/nix/store/vzchfq6fvnvp6qipm393ymjbgxjjsysi-glibc-iconv-2.38",
+              "default": true
+            }
+          ],
+          "store_path": "/nix/store/vzchfq6fvnvp6qipm393ymjbgxjjsysi-glibc-iconv-2.38"
+        },
+        "x86_64-linux": {
+          "outputs": [
+            {
+              "name": "out",
+              "path": "/nix/store/qkg9zz9rpd6spva392vxl9i7i7yq98hn-glibc-iconv-2.38",
+              "default": true
+            }
+          ],
+          "store_path": "/nix/store/qkg9zz9rpd6spva392vxl9i7i7yq98hn-glibc-iconv-2.38"
+        }
+      }
+    },
+    "rustup@latest": {
+      "last_modified": "2024-03-22T11:26:23Z",
+      "plugin_version": "0.0.1",
+      "resolved": "github:NixOS/nixpkgs/a3ed7406349a9335cb4c2a71369b697cecd9d351#rustup",
+      "source": "devbox-search",
+      "version": "1.26.0",
+      "systems": {
+        "aarch64-darwin": {
+          "outputs": [
+            {
+              "name": "out",
+              "path": "/nix/store/4h4wdqlcn4zjxkkyd6s97pg1xfajmd9v-rustup-1.26.0",
+              "default": true
+            }
+          ],
+          "store_path": "/nix/store/4h4wdqlcn4zjxkkyd6s97pg1xfajmd9v-rustup-1.26.0"
+        },
+        "aarch64-linux": {
+          "outputs": [
+            {
+              "name": "out",
+              "path": "/nix/store/aqjaj4clf99y11mpp9yhbp1c364gkx4h-rustup-1.26.0",
+              "default": true
+            }
+          ],
+          "store_path": "/nix/store/aqjaj4clf99y11mpp9yhbp1c364gkx4h-rustup-1.26.0"
+        },
+        "x86_64-darwin": {
+          "outputs": [
+            {
+              "name": "out",
+              "path": "/nix/store/wn6ka9g6nzgd1wfmyy5jfb9m89b9mzzc-rustup-1.26.0",
+              "default": true
+            }
+          ],
+          "store_path": "/nix/store/wn6ka9g6nzgd1wfmyy5jfb9m89b9mzzc-rustup-1.26.0"
+        },
+        "x86_64-linux": {
+          "outputs": [
+            {
+              "name": "out",
+              "path": "/nix/store/d2kbjhk0l81i1yflqfbkxqjfgq0xx1qz-rustup-1.26.0",
+              "default": true
+            }
+          ],
+          "store_path": "/nix/store/d2kbjhk0l81i1yflqfbkxqjfgq0xx1qz-rustup-1.26.0"
+        }
+      }
+    }
+  }
+}