diff --git a/pixi.lock b/pixi.lock
index 87b1704..7ac5c6b 100644
--- a/pixi.lock
+++ b/pixi.lock
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-  url: https://conda.anaconda.org/conda-forge/linux-aarch64/pkg-config-0.29.2-hce167ba_1009.conda
-  sha256: 6468cbfaf1d3140be46dd315ec383d373dbbafd770ce2efe77c3f0cdbc4576c1
-  md5: 05eda637f6465f7e8c5ab7e341341ea9
+  name: pixi
+  version: 0.35.0
+  build: hf908766_0
+  subdir: osx-64
+  url: https://conda.anaconda.org/conda-forge/osx-64/pixi-0.35.0-hf908766_0.conda
+  sha256: d1c46d6dd72d92fb00aa0d7fd4d9326ee1914f17fbae5b3ff629ff09b7229971
+  md5: 47cd52b2bdc2895d2d5c1855ad400e43
   depends:
-  - libgcc-ng >=12
-  - libglib >=2.80.3,<3.0a0
-  license: GPL-2.0-or-later
-  license_family: GPL
-  size: 54834
-  timestamp: 1720806008171
+  - __osx >=10.13
+  - libcxx >=16
+  constrains:
+  - __osx >=10.13
+  license: BSD-3-Clause
+  license_family: BSD
+  size: 13024182
+  timestamp: 1730881335104
 - kind: conda
-  name: pkg-config
-  version: 0.29.2
-  build: hde07d2e_1009
-  build_number: 1009
+  name: pixi
+  version: 0.35.0
+  build: hfca66f1_0
   subdir: osx-arm64
-  url: https://conda.anaconda.org/conda-forge/osx-arm64/pkg-config-0.29.2-hde07d2e_1009.conda
-  sha256: d82f4655b2d67fe12eefe1a3eea4cd27d33fa41dbc5e9aeab5fd6d3d2c26f18a
-  md5: b4f41e19a8c20184eec3aaf0f0953293
+  url: https://conda.anaconda.org/conda-forge/osx-arm64/pixi-0.35.0-hfca66f1_0.conda
+  sha256: e3a1c09a2f9b372db479c94398386d42dd52e7349fae68809638f1d5cff13859
+  md5: ddf949b8c6edaf942336b42d9e12bfc7
   depends:
   - __osx >=11.0
-  - libglib >=2.80.3,<3.0a0
-  - libiconv >=1.17,<2.0a0
-  license: GPL-2.0-or-later
-  license_family: GPL
-  size: 49724
-  timestamp: 1720806128118
-- kind: conda
-  name: pkg-config
-  version: 0.29.2
-  build: hf7e621a_1009
-  build_number: 1009
-  subdir: osx-64
-  url: https://conda.anaconda.org/conda-forge/osx-64/pkg-config-0.29.2-hf7e621a_1009.conda
-  sha256: 636122606556b651ad4d0ac60c7ab6b379e98f390359a1f0c05ad6ba6fb3837f
-  md5: 0b1b9f9e420e4a0e40879b61f94ae646
-  depends:
-  - __osx >=10.13
-  - libiconv >=1.17,<2.0a0
-  license: GPL-2.0-or-later
-  license_family: GPL
-  size: 239818
-  timestamp: 1720806136579
+  - libcxx >=16
+  constrains:
+  - __osx >=11.0
+  license: BSD-3-Clause
+  license_family: BSD
+  size: 12603248
+  timestamp: 1730881698659
 - kind: conda
   name: platformdirs
   version: 4.3.6
@@ -7744,68 +7603,6 @@ packages:
   license_family: Proprietary
   size: 750719
   timestamp: 1728401055788
-- kind: conda
-  name: vhs
-  version: 0.7.2
-  build: h57928b3_0
-  subdir: win-64
-  url: https://conda.anaconda.org/conda-forge/win-64/vhs-0.7.2-h57928b3_0.conda
-  sha256: 03253eaae3dc31c6b51880bd2b2a82d1a385a8bdf98902435f0057d0c5405bee
-  md5: 93835a8e015c3d4bd750ed6924adca75
-  license: MIT
-  license_family: MIT
-  size: 12993453
-  timestamp: 1718058512684
-- kind: conda
-  name: vhs
-  version: 0.7.2
-  build: h694c41f_0
-  subdir: osx-64
-  url: https://conda.anaconda.org/conda-forge/osx-64/vhs-0.7.2-h694c41f_0.conda
-  sha256: fa298ca45861f98b06c0096dd9cf0aba88c183542f4205c755418917193a846d
-  md5: f9c8abf97e5ffb91de6df05e6f7e8035
-  constrains:
-  - __osx>=10.12
-  license: MIT
-  license_family: MIT
-  size: 13967983
-  timestamp: 1718058031870
-- kind: conda
-  name: vhs
-  version: 0.7.2
-  build: h8af1aa0_0
-  subdir: linux-aarch64
-  url: https://conda.anaconda.org/conda-forge/linux-aarch64/vhs-0.7.2-h8af1aa0_0.conda
-  sha256: b3586e5d33c582c69ae0cae1b13bcbbb9ddf04ec38e9b9e78e0aa221746d0765
-  md5: 8f04d45f540516eabbf02c7903b4176a
-  license: MIT
-  license_family: MIT
-  size: 12831807
-  timestamp: 1718089666549
-- kind: conda
-  name: vhs
-  version: 0.7.2
-  build: ha770c72_0
-  subdir: linux-64
-  url: https://conda.anaconda.org/conda-forge/linux-64/vhs-0.7.2-ha770c72_0.conda
-  sha256: 1e24c28aa0c73b4133bc55f5cbcc6cf35730361beb48ae3b19e086cf381e3fee
-  md5: c5a1882b6bd21bc00efedd9aa7dd56a7
-  license: MIT
-  license_family: MIT
-  size: 13680299
-  timestamp: 1718057875259
-- kind: conda
-  name: vhs
-  version: 0.7.2
-  build: hce30654_0
-  subdir: osx-arm64
-  url: https://conda.anaconda.org/conda-forge/osx-arm64/vhs-0.7.2-hce30654_0.conda
-  sha256: 309981f7b9b66e4308e64ae698b65302e26b28a1e7d912e6db6fc400b400a140
-  md5: bd079d19fb232578ed65369f42d6175d
-  license: MIT
-  license_family: MIT
-  size: 13402928
-  timestamp: 1718057909213
 - kind: conda
   name: virtualenv
   version: 20.27.1
diff --git a/src/main.rs b/src/main.rs
index 0483967..1b83ddc 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -4,14 +4,12 @@ use clap::Parser;
 use clap_verbosity_flag::Verbosity;
 
 use anyhow::Result;
+use rattler_conda_types::{package::ArchiveType, PackageRecord, PrefixRecord};
+use rattler_index::{package_record_from_conda, package_record_from_tar_bz2};
 use tracing_log::AsTrace;
 
 /* -------------------------------------------- CLI -------------------------------------------- */
 
-fn cwd() -> PathBuf {
-    std::env::current_dir().expect("failed to obtain current working directory")
-}
-
 /// The pixi-inject CLI.
 #[derive(Parser, Debug)]
 #[command(version, about, long_about = None)]
@@ -40,10 +38,42 @@ async fn main() -> Result<()> {
     tracing::debug!("Starting pixi-inject CLI");
     tracing::debug!("Parsed CLI options: {:?}", cli);
 
-    match cli {
-        _ => {}
-    };
-    tracing::debug!("Finished running pixi-inject");
+    let prefix = cli.prefix.unwrap(); // todo: fix unwrap
+    let packages = cli.package;
+
+    if packages.len() == 0 {
+        return Err(anyhow::anyhow!("No packages were provided."));
+    }
+
+    let prefix_package_records = PrefixRecord::collect_from_prefix(&prefix)?
+        .iter()
+        .map(|e| e.repodata_record.clone().package_record)
+        .collect::<Vec<_>>();
 
+    let injected_packages: Vec<(PathBuf, ArchiveType)> = packages
+        .iter()
+        .filter_map(|e| {
+            ArchiveType::split_str(e.as_path().to_string_lossy().as_ref())
+                .map(|(p, t)| (PathBuf::from(format!("{}{}", p, t.extension())), t))
+        })
+        .collect();
+
+    let mut package_records = Vec::new();
+
+    tracing::info!("Retrieving metadata of {} injected packages.", injected_packages.len());
+    for (path, archive_type) in injected_packages.iter() {
+        let package_record = match archive_type {
+            ArchiveType::TarBz2 => package_record_from_tar_bz2(path),
+            ArchiveType::Conda => package_record_from_conda(path),
+        }?;
+        package_records.push(package_record);
+    }
+
+    tracing::debug!("Validating package compatibility with prefix.");
+    let all_records = prefix_package_records.iter().chain(package_records.iter()).collect();
+    PackageRecord::validate(all_records)?;
+    tracing::debug!("All packages are compatible with the prefix.");
+
+    tracing::debug!("Finished running pixi-inject");
     Ok(())
 }