diff --git a/rocks-bin/src/download.rs b/rocks-bin/src/download.rs
index 75b34388..e2cdf6a3 100644
--- a/rocks-bin/src/download.rs
+++ b/rocks-bin/src/download.rs
@@ -1,10 +1,10 @@
 use clap::Args;
 use eyre::Result;
-use rocks_lib::config::Config;
+use rocks_lib::{config::Config, lua_package::PackageName};
 
 #[derive(Args)]
 pub struct Download {
-    name: String,
+    name: PackageName,
     version: Option<String>,
 }
 
diff --git a/rocks-bin/src/install.rs b/rocks-bin/src/install.rs
index a0ca0e90..c994fcc3 100644
--- a/rocks-bin/src/install.rs
+++ b/rocks-bin/src/install.rs
@@ -1,10 +1,10 @@
 use eyre::Result;
-use rocks_lib::config::Config;
+use rocks_lib::{config::Config, lua_package::PackageName};
 
 #[derive(clap::Args)]
 pub struct Install {
     /// Name of the rock to install.
-    name: String,
+    name: PackageName,
     /// Rocks version to install.
     version: Option<String>,
 }
diff --git a/rocks-bin/src/search.rs b/rocks-bin/src/search.rs
index 03aa37a0..769ab2c2 100644
--- a/rocks-bin/src/search.rs
+++ b/rocks-bin/src/search.rs
@@ -7,13 +7,14 @@ use text_trees::{FormatCharacters, StringTreeNode, TreeFormatting};
 
 use rocks_lib::{
     config::Config,
+    lua_package::PackageName,
     manifest::{manifest_from_server, ManifestMetadata},
 };
 
 #[derive(Args)]
 pub struct Search {
     /// Name of the rock to search for.
-    name: String,
+    name: PackageName,
     /// Rocks version to search for.
     version: Option<String>,
     // TODO(vhyrro): Add options.
@@ -29,11 +30,11 @@ pub async fn search(data: Search, config: &Config) -> Result<()> {
 
     let metadata = ManifestMetadata::new(&manifest)?;
 
-    let rock_to_version_map: HashMap<&String, Vec<&String>> = metadata
+    let rock_to_version_map: HashMap<&PackageName, Vec<&String>> = metadata
         .repository
         .iter()
         .filter_map(|(key, value)| {
-            if key.contains(&data.name) {
+            if key.to_string().contains(&data.name.to_string()) {
                 Some((
                     key,
                     value.keys().sorted_by(|a, b| Ord::cmp(b, a)).collect_vec(),
@@ -48,7 +49,7 @@ pub async fn search(data: Search, config: &Config) -> Result<()> {
         println!("{}", serde_json::to_string(&rock_to_version_map)?);
     } else {
         for (key, versions) in rock_to_version_map.into_iter().sorted() {
-            let mut tree = StringTreeNode::new(key.to_owned());
+            let mut tree = StringTreeNode::new(key.to_string().to_owned());
 
             for version in versions {
                 tree.push(version.to_owned());
diff --git a/rocks-bin/src/unpack.rs b/rocks-bin/src/unpack.rs
index ae452c06..8ba19d54 100644
--- a/rocks-bin/src/unpack.rs
+++ b/rocks-bin/src/unpack.rs
@@ -2,7 +2,7 @@ use std::path::PathBuf;
 
 use clap::Args;
 use eyre::Result;
-use rocks_lib::config::Config;
+use rocks_lib::{config::Config, lua_package::PackageName};
 
 #[derive(Args)]
 pub struct Unpack {
@@ -15,7 +15,7 @@ pub struct Unpack {
 #[derive(Args)]
 pub struct UnpackRemote {
     /// The name of the rock to unpack
-    name: String,
+    name: PackageName,
     /// The version of the rock to download (defaults to latest version)
     version: Option<String>,
     /// The directory to unpack to
diff --git a/rocks-lib/src/lua_package/mod.rs b/rocks-lib/src/lua_package/mod.rs
index e6feaa44..4961eb90 100644
--- a/rocks-lib/src/lua_package/mod.rs
+++ b/rocks-lib/src/lua_package/mod.rs
@@ -1,6 +1,6 @@
 use eyre::Result;
 use semver::Version;
-use serde::Deserialize;
+use serde::{Deserialize, Serialize};
 use std::fmt::Display;
 
 mod version;
@@ -29,7 +29,7 @@ impl LuaPackage {
 }
 
 /// A luarocks package name, which is always lowercase
-#[derive(Deserialize, Debug, PartialEq, Eq, Clone)]
+#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Clone, Hash)]
 pub struct PackageName {
     name: String,
 }
@@ -43,6 +43,24 @@ impl PackageName {
     }
 }
 
+impl<'de> Deserialize<'de> for PackageName {
+    fn deserialize<D>(deserializer: D) -> std::result::Result<Self, D::Error>
+    where
+        D: serde::Deserializer<'de>,
+    {
+        Ok(PackageName::new(String::deserialize(deserializer)?))
+    }
+}
+
+impl Serialize for PackageName {
+    fn serialize<S>(&self, serializer: S) -> std::result::Result<S::Ok, S::Error>
+    where
+        S: serde::Serializer,
+    {
+        self.name.serialize(serializer)
+    }
+}
+
 impl From<&str> for PackageName {
     fn from(value: &str) -> Self {
         Self::new(value.into())
diff --git a/rocks-lib/src/manifest/metadata.rs b/rocks-lib/src/manifest/metadata.rs
index 0fbe16e0..be238c22 100644
--- a/rocks-lib/src/manifest/metadata.rs
+++ b/rocks-lib/src/manifest/metadata.rs
@@ -3,11 +3,18 @@ use itertools::Itertools;
 use mlua::{Lua, LuaSerdeExt};
 use std::collections::HashMap;
 
-use crate::config::Config;
+use crate::{config::Config, lua_package::PackageName};
 
 #[derive(serde::Deserialize)]
 pub struct ManifestMetadata {
-    pub repository: HashMap<String, HashMap<String, Vec<HashMap<String, String>>>>,
+    /// The key of each package's HashMap is the version string
+    pub repository: HashMap<PackageName, HashMap<String, Vec<ManifestRockEntry>>>,
+}
+
+#[derive(serde::Deserialize)]
+pub struct ManifestRockEntry {
+    /// e.g. "linux-x86_64", "rockspec", "src", ...
+    pub arch: String,
 }
 
 impl ManifestMetadata {
@@ -31,11 +38,11 @@ impl ManifestMetadata {
         Self::new(&manifest)
     }
 
-    pub fn has_rock(&self, rock_name: &String) -> bool {
+    pub fn has_rock(&self, rock_name: &PackageName) -> bool {
         self.repository.contains_key(rock_name)
     }
 
-    pub fn available_versions(&self, rock_name: &String) -> Option<Vec<&String>> {
+    pub fn available_versions(&self, rock_name: &PackageName) -> Option<Vec<&String>> {
         if !self.has_rock(rock_name) {
             return None;
         }
@@ -43,7 +50,7 @@ impl ManifestMetadata {
         Some(self.repository[rock_name].keys().collect())
     }
 
-    pub fn latest_version(&self, rock_name: &String) -> Option<&String> {
+    pub fn latest_version(&self, rock_name: &PackageName) -> Option<&String> {
         if !self.has_rock(rock_name) {
             return None;
         }
diff --git a/rocks-lib/src/operations/download.rs b/rocks-lib/src/operations/download.rs
index 013de5d7..2a39b4cb 100644
--- a/rocks-lib/src/operations/download.rs
+++ b/rocks-lib/src/operations/download.rs
@@ -2,16 +2,16 @@ use std::path::PathBuf;
 
 use eyre::{eyre, Result};
 
-use crate::config::Config;
+use crate::{config::Config, lua_package::PackageName};
 
 pub struct DownloadedRock {
-    pub name: String,
+    pub name: PackageName,
     pub version: String,
     pub path: PathBuf,
 }
 
 pub async fn download(
-    rock_name: &String,
+    rock_name: &PackageName,
     rock_version: Option<&String>,
     destination_dir: Option<PathBuf>,
     config: &Config,
diff --git a/rocks-lib/src/operations/install.rs b/rocks-lib/src/operations/install.rs
index f51cad87..e1095fb9 100644
--- a/rocks-lib/src/operations/install.rs
+++ b/rocks-lib/src/operations/install.rs
@@ -1,14 +1,14 @@
 use eyre::Result;
 use tempdir::TempDir;
 
-use crate::{config::Config, rockspec::Rockspec};
+use crate::{config::Config, lua_package::PackageName, rockspec::Rockspec};
 
 pub async fn install(
-    rock_name: String,
+    rock_name: PackageName,
     rock_version: Option<String>,
     config: &Config,
 ) -> Result<()> {
-    let temp = TempDir::new(&rock_name)?;
+    let temp = TempDir::new(&rock_name.to_string())?;
 
     let rock = super::download(
         &rock_name,