Re-introduce tar

cabal.project

@@ -3,7 +3,7 @@ packages: ./ghcup.cabal
 optional-packages: ./vendored/*/*.cabal
 
 package ghcup
-    flags: +tui
+    flags: +tui +tar
 
 constraints: http-io-streams -brotli,
              any.aeson >= 2.0.1.0
@@ -13,6 +13,11 @@ source-repository-package
   location: https://github.com/fosskers/versions.git
   tag: 7bc3355348aac3510771d4622aff09ac38c9924d
 
+source-repository-package
+  type: git
+  location: https://github.com/haskell/tar.git
+  tag: d94a988be4311b830149a9f8fc16739927e5fc1c
+
 package libarchive
   flags: -system-libarchive
 
@@ -30,3 +35,6 @@ package streamly
 
 package *
   test-show-details: direct
+
+allow-newer: cabal-install-parsers:tar
+