Use platform specific project files

cabal.ghc8107.project

@@ -1,62 +1,8 @@
-packages: ./ghcup.cabal
-
-optional-packages: ./vendored/*/*.cabal
-
-if impl(ghc < 9.0)
-    package ghcup
-        flags: +tui -tar
-else
-    package ghcup
-        flags: +tui +tar
-
-constraints: http-io-streams -brotli,
-             any.aeson >= 2.0.1.0,
-             any.hsc2hs ==0.68.8,
-             bzlib-conduit >= 0.3.0.3,
-             bz2 >= 1.0.1.1,
-             bzlib >= 0.5.2.0,
-             directory >= 1.3.8.3,
-             filepath == 1.4.101.0 || == 1.4.300.1 || >= 1.5.2.0
-
 if os(mingw32)
-  constraints: zlib +bundled-c-zlib,
-               lzma +static,
-               text -simdutf,
-               vty-windows >=0.2.0.2
-
-  if impl(ghc >= 9.4)
-    constraints: language-c >= 0.9.3
-
-
-source-repository-package
-  type: git
-  location: https://github.com/haskell/tar.git
-  tag: d94a988be4311b830149a9f8fc16739927e5fc1c
-
-source-repository-package
-  type: git
-  location: https://github.com/hasufell/uri-bytestring.git
-  tag: 4fb5ed14b500c192e6e7a97f6b2b1eb478806001
-
-package libarchive
-  flags: -system-libarchive
-
-package aeson-pretty
-  flags: +lib-only
-
-package cabal-plan
-  flags: -exe
-
-package aeson
-  flags: +ordered-keymap
-
-package streamly
-  flags: +use-unliftio
-
-package *
-  test-show-details: direct
-
-allow-newer: cabal-install-parsers:tar, streamly:Win32
-
+  import: cabal.ghc8107.Win32.project
+  import: cabal.ghc8107.Win32.project.freeze
+else
+  import: cabal.ghc8107.Unix.project
+  import: cabal.ghc8107.Unix.project.freeze
 
 with-compiler: ghc-8.10.7