diff --git a/src/lock_file/satisfiability.rs b/src/lock_file/satisfiability.rs
index 7a4f4bfc6..1fed49348 100644
--- a/src/lock_file/satisfiability.rs
+++ b/src/lock_file/satisfiability.rs
@@ -48,6 +48,9 @@ pub enum PlatformUnsat {
     #[error("there are more conda packages in the lock-file than are used by the environment")]
     TooManyCondaPackages,
 
+    #[error("missing purls")]
+    MissingPurls,
+
     #[error("corrupted lock-file entry for '{0}'")]
     CorruptedEntry(String, ConversionError),
 
@@ -167,6 +170,20 @@ pub fn verify_platform_satisfiability(
         }
     }
 
+    // to reflect new purls for pypi packages
+    // we need to invalidate the locked environment
+    // if all conda packages have empty purls
+    if environment.has_pypi_dependencies()
+        && pypi_packages.is_empty()
+        && !conda_packages
+            .iter()
+            .any(|record| !record.package_record.purls.is_empty())
+    {
+        {
+            return Err(PlatformUnsat::MissingPurls);
+        }
+    }
+
     // Create a lookup table from package name to package record. Returns an error if we find a
     // duplicate entry for a record
     let repodata_records_by_name = match RepoDataRecordsByName::from_unique_iter(conda_packages) {
diff --git a/src/lock_file/update.rs b/src/lock_file/update.rs
index 0f69ef3bd..966b13f6a 100644
--- a/src/lock_file/update.rs
+++ b/src/lock_file/update.rs
@@ -1470,6 +1470,19 @@ async fn spawn_solve_pypi_task(
         tokio::join!(repodata_records, prefix, semaphore.acquire_owned());
 
     let environment_name = environment.name().clone();
+
+    let pypi_name_mapping_location = environment.project().pypi_name_mapping_source();
+
+    let mut conda_records = repodata_records.records.clone();
+
+    pypi_mapping::amend_pypi_purls(
+        environment.project().client().clone(),
+        pypi_name_mapping_location,
+        &mut conda_records,
+        None,
+    )
+    .await?;
+
     // let (pypi_packages, duration) = tokio::spawn(
     let (pypi_packages, duration) = async move {
         let pb = SolveProgressBar::new(
@@ -1493,7 +1506,7 @@ async fn spawn_solve_pypi_task(
                 .map(|(name, requirement)| (name.as_normalized().clone(), requirement))
                 .collect(),
             system_requirements,
-            &repodata_records.records,
+            &conda_records,
             platform,
             &pb.pb,
             &python_path,
diff --git a/src/pypi_mapping/prefix_pypi_name_mapping.rs b/src/pypi_mapping/prefix_pypi_name_mapping.rs
index 6421a52a1..989b3cdac 100644
--- a/src/pypi_mapping/prefix_pypi_name_mapping.rs
+++ b/src/pypi_mapping/prefix_pypi_name_mapping.rs
@@ -64,6 +64,11 @@ pub async fn conda_pypi_name_mapping(
 ) -> miette::Result<HashMap<Sha256Hash, Package>> {
     let filtered_packages = conda_packages
         .iter()
+        // because we later skip adding purls for packages
+        // that have purls
+        // here we only filter packages that don't them
+        // to save some requests
+        .filter(|package| package.package_record.purls.is_empty())
         .filter_map(|package| {
             package
                 .package_record
diff --git a/tests/solve_group_tests.rs b/tests/solve_group_tests.rs
index b38c17366..38a2d2b76 100644
--- a/tests/solve_group_tests.rs
+++ b/tests/solve_group_tests.rs
@@ -1,8 +1,12 @@
+use std::str::FromStr;
+
 use crate::common::{
     package_database::{Package, PackageDatabase},
     LockFileExt, PixiControl,
 };
-use rattler_conda_types::Platform;
+use rattler_conda_types::{PackageName, Platform};
+use rattler_lock::DEFAULT_ENVIRONMENT_NAME;
+use serial_test::serial;
 use tempfile::TempDir;
 use url::Url;
 
@@ -83,3 +87,64 @@ async fn conda_solve_group_functionality() {
         "test should contain bar"
     );
 }
+
+#[tokio::test(flavor = "multi_thread", worker_threads = 1)]
+#[serial]
+// #[cfg_attr(not(feature = "slow_integration_tests"), ignore)]
+async fn test_purl_are_added_for_pypi() {
+    let pixi = PixiControl::new().unwrap();
+    pixi.init().await.unwrap();
+    // Add and update lockfile with this version of python
+    pixi.add("boltons").with_install(true).await.unwrap();
+
+    let lock_file = pixi.up_to_date_lock_file().await.unwrap();
+
+    // Check if boltons has a purl
+    lock_file
+        .default_environment()
+        .unwrap()
+        .packages(Platform::current())
+        .unwrap()
+        .for_each(|dep| {
+            if dep.as_conda().unwrap().package_record().name
+                == PackageName::from_str("boltons").unwrap()
+            {
+                assert!(dep.as_conda().unwrap().package_record().purls.is_empty());
+            }
+        });
+
+    // Add boltons from pypi
+    pixi.add("boltons")
+        .with_install(true)
+        .set_type(pixi::DependencyType::PypiDependency)
+        .await
+        .unwrap();
+
+    let lock_file = pixi.up_to_date_lock_file().await.unwrap();
+
+    // Check if boltons has a purl
+    lock_file
+        .default_environment()
+        .unwrap()
+        .packages(Platform::current())
+        .unwrap()
+        .for_each(|dep| {
+            if dep.as_conda().unwrap().package_record().name
+                == PackageName::from_str("boltons").unwrap()
+            {
+                assert!(!dep.as_conda().unwrap().package_record().purls.is_empty());
+            }
+        });
+
+    // Check if boltons exists only as conda dependency
+    assert!(lock_file.contains_match_spec(
+        DEFAULT_ENVIRONMENT_NAME,
+        Platform::current(),
+        "boltons"
+    ));
+    assert!(!lock_file.contains_pypi_package(
+        DEFAULT_ENVIRONMENT_NAME,
+        Platform::current(),
+        "boltons"
+    ));
+}