diff --git a/.cspell-project-words.txt b/.cspell-project-words.txt
index b69f75593e317dd68700fa0ab17a133934013036..852d5aa339003101e13d901e97752104e3e65f91 100644
--- a/.cspell-project-words.txt
+++ b/.cspell-project-words.txt
@@ -7,3 +7,4 @@ colinodell
 testlogger
 kanopi
 tabwise
+sophron
diff --git a/css/pb.css b/css/pb.css
index 20adee504d98e8b2fe2c56eaa8f9d6948086d436..cbad4fd6646a0381d62e2dbcf2b33167f64ee656 100644
--- a/css/pb.css
+++ b/css/pb.css
@@ -630,7 +630,7 @@
 .search__search_term::-webkit-search-decoration,
 .search__search_term::-webkit-search-results-button,
 .search__search_term::-webkit-search-results-decoration {
-    display: none;
+  display: none;
 }
 
 .search__search-bar {
diff --git a/src/Controller/InstallerController.php b/src/Controller/InstallerController.php
index 9d5c384354890662e1f562c65e51f5c3923b1ed9..7020569eded734164addc0fabc885f61108d4dc6 100644
--- a/src/Controller/InstallerController.php
+++ b/src/Controller/InstallerController.php
@@ -395,7 +395,7 @@ class InstallerController extends ControllerBase {
 
     try {
       $stage_id = $this->installer->create();
-      $this->setRequiringState($project->uuid, 'creating install stage', $stage_id);
+      $this->setRequiringState($project->id, 'creating install stage', $stage_id);
     }
     catch (\Exception $e) {
       $this->cancelRequire();
diff --git a/src/EnabledSourceHandler.php b/src/EnabledSourceHandler.php
index 7f4e22d20a98bee49a1ecaef12c1097daf0bfed2..79779f855449e11ff9bf4d0c24e9380779fbb445 100644
--- a/src/EnabledSourceHandler.php
+++ b/src/EnabledSourceHandler.php
@@ -3,7 +3,6 @@
 namespace Drupal\project_browser;
 
 use Drupal\Component\Serialization\Json;
-use Drupal\Component\Uuid\UuidInterface;
 use Drupal\Core\Config\ConfigCrudEvent;
 use Drupal\Core\Config\ConfigEvents;
 use Drupal\Core\Config\ConfigFactoryInterface;
@@ -35,7 +34,6 @@ class EnabledSourceHandler implements LoggerAwareInterface, EventSubscriberInter
     private readonly ConfigFactoryInterface $configFactory,
     private readonly ProjectBrowserSourceManager $pluginManager,
     private readonly ActivatorInterface $activator,
-    private readonly UuidInterface $uuid,
     KeyValueExpirableFactoryInterface $keyValueFactory,
   ) {
     $this->keyValue = $keyValueFactory->get('project_browser');
@@ -117,10 +115,11 @@ class EnabledSourceHandler implements LoggerAwareInterface, EventSubscriberInter
       $stored = [];
       foreach ($projects as $source_id => $results) {
         foreach ($results->list as $project) {
-          // Each project is identified by a UUID which persists until the data
-          // store is wiped.
-          $project->uuid = $this->uuid->generate();
-          $this->keyValue->set($project->uuid, $project);
+          // Generate an ID for the project from the package name and machine
+          // name, which are unlikely to change. This isn't security-sensitive,
+          // so SHA1 is okay for this purpose.
+          $project->id = sha1($source_id . $project->packageName . $project->machineName);
+          $this->keyValue->setIfNotExists($project->id, $project);
           // Add activation data to the project.
           $this->getActivationData($project);
         }
@@ -128,7 +127,7 @@ class EnabledSourceHandler implements LoggerAwareInterface, EventSubscriberInter
         // ProjectsResultsPage.
         $stored[$source_id] = [
           $results->totalResults,
-          array_column($results->list, 'uuid'),
+          array_column($results->list, 'id'),
           $results->pluginLabel,
         ];
       }
diff --git a/src/ProjectBrowser/Project.php b/src/ProjectBrowser/Project.php
index d0c95a3c253b01952f4b6f720c3517e8598e294b..fc8370593af593a262d1f99eb710312f4d4634d0 100644
--- a/src/ProjectBrowser/Project.php
+++ b/src/ProjectBrowser/Project.php
@@ -15,13 +15,13 @@ use Drupal\project_browser\ProjectType;
 class Project implements \JsonSerializable {
 
   /**
-   * A persistent UUID for this project in non-volatile storage.
+   * A persistent ID for this project in non-volatile storage.
    *
    * @var string
    *
    * @see \Drupal\project_browser\EnabledSourceHandler::getProjects()
    */
-  public string $uuid;
+  public string $id;
 
   /**
    * The status of this project in the current site.
@@ -186,7 +186,7 @@ class Project implements \JsonSerializable {
       'created' => $this->created,
       'selector_id' => $this->getSelectorId(),
       'commands' => $commands,
-      'id' => $this->uuid,
+      'id' => $this->id,
     ];
   }
 
diff --git a/tests/src/Functional/InstallerControllerTest.php b/tests/src/Functional/InstallerControllerTest.php
index a5f4ef5250ae22f1af788ca94f97790370937ae6..e3276054acb154c73f7b8db53d238e0a0569fa05 100644
--- a/tests/src/Functional/InstallerControllerTest.php
+++ b/tests/src/Functional/InstallerControllerTest.php
@@ -625,7 +625,7 @@ class InstallerControllerTest extends BrowserTestBase {
     foreach ($projects as $results_page) {
       foreach ($results_page->list as $project) {
         if ($project->machineName === $module_name) {
-          return $project->uuid;
+          return $project->id;
         }
       }
     }
diff --git a/tests/src/FunctionalJavascript/ProjectBrowserInstallerUiTest.php b/tests/src/FunctionalJavascript/ProjectBrowserInstallerUiTest.php
index e7aaf954aa48c1616888dba5e54aa92cb59562f4..e0bc77d70d6b83b2d894a6debf1ee2906ec043c1 100644
--- a/tests/src/FunctionalJavascript/ProjectBrowserInstallerUiTest.php
+++ b/tests/src/FunctionalJavascript/ProjectBrowserInstallerUiTest.php
@@ -274,7 +274,7 @@ class ProjectBrowserInstallerUiTest extends WebDriverTestBase {
         if (method_exists($source, 'isProjectSafe') && !$source->isProjectSafe($project)) {
           continue;
         }
-        return $project->uuid;
+        return $project->id;
       }
     }
     $this->fail("Could not find a project to install from amongst the enabled sources.");
diff --git a/tests/src/Kernel/EnabledSourceHandlerTest.php b/tests/src/Kernel/EnabledSourceHandlerTest.php
index 64ba6a163053f2c52dfcadb54b257f1ed70f55aa..fa0452aff60db9e70c3ee6e0b63641eb990f0562 100644
--- a/tests/src/Kernel/EnabledSourceHandlerTest.php
+++ b/tests/src/Kernel/EnabledSourceHandlerTest.php
@@ -61,7 +61,7 @@ class EnabledSourceHandlerTest extends KernelTestBase {
     $this->assertNotEmpty($list);
     $project = reset($list);
 
-    $project_again = $handler->getStoredProject($project->uuid);
+    $project_again = $handler->getStoredProject($project->id);
     $this->assertNotSame($project, $project_again);
     $this->assertSame($project->jsonSerialize(), $project_again->jsonSerialize());
 
@@ -86,7 +86,7 @@ class EnabledSourceHandlerTest extends KernelTestBase {
     // `commands` properties should be uninitialized.
     $project = $this->container->get('keyvalue.expirable')
       ->get('project_browser')
-      ->get($project->uuid);
+      ->get($project->id);
     $this->assertInstanceOf(Project::class, $project);
     $this->assertFalse(self::hasActivationData($project));
   }