3 files changed, 6 insertions, 4 deletions
diff --git a/lua/mason-registry/installer.lua b/lua/mason-registry/installer.lua
index a5c9fe92..05592227 100644
--- a/lua/mason-registry/installer.lua
+++ b/lua/mason-registry/installer.lua
@@ -40,7 +40,7 @@ function M.install(sources, on_progress)
     M.channel = OneShotChannel:new()
 
     local finished_registries = {}
-    local registries = sources:to_list { include_uninstalled = true }
+    local registries = sources:to_list { include_uninstalled = true, include_synthesized = false }
 
     local results = {
         a.wait_all(_.map(
diff --git a/lua/mason-registry/sources/init.lua b/lua/mason-registry/sources/init.lua
index f468a8ef..36e62ec5 100644
--- a/lua/mason-registry/sources/init.lua
+++ b/lua/mason-registry/sources/init.lua
@@ -191,7 +191,9 @@ function LazySourceCollection:checksum()
     return vim.fn.sha256(table.concat(registry_ids, ""))
 end
 
----@param opts? { include_uninstalled?: boolean, include_synthesized?: boolean }
+---@alias LazySourceCollectionIterate { include_uninstalled?: boolean, include_synthesized?: boolean }
+
+---@param opts? LazySourceCollectionIterate
 function LazySourceCollection:iterate(opts)
     opts = opts or {}
 
@@ -213,7 +215,7 @@ function LazySourceCollection:iterate(opts)
     end
 end
 
----@param opts? { include_uninstalled?: boolean }
+---@param opts? LazySourceCollectionIterate
 function LazySourceCollection:to_list(opts)
     opts = opts or {}
     local list = {}
diff --git a/lua/mason-registry/sources/synthesized.lua b/lua/mason-registry/sources/synthesized.lua
index 75638cd6..8cad635e 100644
--- a/lua/mason-registry/sources/synthesized.lua
+++ b/lua/mason-registry/sources/synthesized.lua
@@ -49,7 +49,7 @@ function SynthesizedRegistrySource:load_package(pkg_name, receipt)
         homepage = "",
         licenses = {},
         deprecation = {
-            since = receipt:get_installed_package_version() or "N/A",
+            since = installed_version or "N/A",
             message = "This package has been removed from the registry.",
         },
         source = source,