diff --git a/runtime/doc/pack.txt b/runtime/doc/pack.txt
index aa3fdfb5fb..8ba0e3a68b 100644
--- a/runtime/doc/pack.txt
+++ b/runtime/doc/pack.txt
@@ -375,7 +375,8 @@ add({specs}, {opts})                                          *vim.pack.add()*
         nothing.
       • If doesn't exist, install it by downloading from `src` into `name`
         subdirectory (via partial blobless `git clone`) and update revision to
-        match `version` (via `git checkout`).
+        match `version` (via `git checkout`). Plugin will not be on disk if
+        any step resulted in an error.
     • For each plugin execute |:packadd| (or customizable `load` function)
       making it reachable by Nvim.
 
diff --git a/runtime/lua/vim/pack.lua b/runtime/lua/vim/pack.lua
index dfcc732d80..bb5b5640eb 100644
--- a/runtime/lua/vim/pack.lua
+++ b/runtime/lua/vim/pack.lua
@@ -677,7 +677,6 @@ local function install_list(plug_list, confirm)
     trigger_event(p, 'PackChangedPre', 'install')
 
     git_clone(p.spec.src, p.path)
-    p.info.installed = true
 
     plugin_lock.plugins[p.spec.name].src = p.spec.src
 
@@ -685,6 +684,7 @@ local function install_list(plug_list, confirm)
     p.info.sha_target = (plugin_lock.plugins[p.spec.name] or {}).rev
 
     checkout(p, timestamp)
+    p.info.installed = true
 
     trigger_event(p, 'PackChanged', 'install')
   end
@@ -694,10 +694,11 @@ local function install_list(plug_list, confirm)
     run_list(plug_list, do_install, 'Installing plugins')
   end
 
-  -- Ensure that not installed plugins are absent in lockfile
+  -- Ensure that not fully installed plugins are absent on disk and in lockfile
   for _, p in ipairs(plug_list) do
     if not p.info.installed then
       plugin_lock.plugins[p.spec.name] = nil
+      vim.fs.rm(p.path, { recursive = true, force = true })
     end
   end
 end
@@ -800,7 +801,8 @@ end
 ---       immediately to clean install from the new source. Otherwise do nothing.
 ---     - If doesn't exist, install it by downloading from `src` into `name`
 ---       subdirectory (via partial blobless `git clone`) and update revision
----       to match `version` (via `git checkout`).
+---       to match `version` (via `git checkout`). Plugin will not be on disk if
+---       any step resulted in an error.
 --- - For each plugin execute |:packadd| (or customizable `load` function) making
 ---   it reachable by Nvim.
 ---
diff --git a/test/functional/plugin/pack_spec.lua b/test/functional/plugin/pack_spec.lua
index e75f586d38..aad3dcddb5 100644
--- a/test/functional/plugin/pack_spec.lua
+++ b/test/functional/plugin/pack_spec.lua
@@ -575,10 +575,9 @@ describe('vim.pack', function()
 
       local pluginerr_hash = git_get_hash('main', 'pluginerr')
       local ref_lockfile = {
-        -- Should be no entry for `repo_not_exist`
+        -- Should be no entry for `repo_not_exist` and `basic` as they did not
+        -- fully install
         plugins = {
-          -- No `rev` because there was no relevant checkout
-          basic = { src = repos_src.basic, version = "'not-exist'" },
           -- Error during sourcing 'plugin/' should not affect lockfile
           pluginerr = { rev = pluginerr_hash, src = repos_src.pluginerr, version = "'main'" },
         },
@@ -605,14 +604,12 @@ describe('vim.pack', function()
       eq(false, vim.tbl_contains(rtp, after_dir))
     end)
 
-    it('does not checkout on bad `version`', function()
+    it('does not install on bad `version`', function()
       local err = pcall_err(exec_lua, function()
         vim.pack.add({ { src = repos_src.basic, version = 'not-exist' } })
       end)
       matches('`not%-exist` is not a branch/tag/commit', err)
-      local plug_path = pack_get_plug_path('basic')
-      local entries = vim.iter(vim.fs.dir(plug_path)):totable()
-      eq({ { '.git', 'directory' } }, entries)
+      eq(false, pack_exists('basic'))
     end)
 
     it('allows changing `src` of installed plugin', function()