build: remove unused `nix/overlays/`

nix/overlays/Cabal-3.10.1.0.nix

-{ mkDerivation, array, base, bytestring, Cabal-syntax, containers
-, deepseq, directory, filepath, lib, mtl, parsec, pretty, process
-, text, time, transformers, unix
-}:
-mkDerivation {
-  pname = "Cabal";
-  version = "3.10.1.0";
-  sha256 = "0bdbab8e4c3178016fb0f070d8b62bc3067f93afabfbd3aa17c8065d0ecc98ee";
-  setupHaskellDepends = [ mtl parsec ];
-  libraryHaskellDepends = [
-    array base bytestring Cabal-syntax containers deepseq directory
-    filepath mtl parsec pretty process text time transformers unix
-  ];
-  doCheck = false;
-  doHaddock = false;
-  homepage = "http://www.haskell.org/cabal/";
-  description = "A framework for packaging Haskell software";
-  license = lib.licenses.bsd3;
-}

nix/overlays/Cabal-syntax-3.10.1.0.nix

-{ mkDerivation, array, base, binary, bytestring, containers
-, deepseq, directory, filepath, lib, mtl, parsec, pretty, text
-, time, transformers, unix
-}:
-mkDerivation {
-  pname = "Cabal-syntax";
-  version = "3.10.1.0";
-  sha256 = "3b80092355327768a0de8298ac50ee906b7e82462e2ba14542730573b453f522";
-  libraryHaskellDepends = [
-    array base binary bytestring containers deepseq directory filepath
-    mtl parsec pretty text time transformers unix
-  ];
-  homepage = "http://www.haskell.org/cabal/";
-  description = "A library for working with .cabal files";
-  license = lib.licenses.bsd3;
-  doCheck = false;
-  doHaddock = false;
-}

nix/overlays/cabal-install-3.10.1.0.nix

-{ mkDerivation, array, async, base, base16-bytestring, binary
-, bytestring, Cabal, Cabal-described ? null, cabal-install-solver
-, Cabal-QuickCheck ? null, Cabal-syntax, Cabal-tree-diff ? null, containers
-, cryptohash-sha256, directory, echo, edit-distance, exceptions
-, filepath, hackage-security, hashable, HTTP, lib, lukko, mtl
-, network-uri, parsec, pretty, pretty-show, process, QuickCheck
-, random, regex-base, regex-posix, resolv, safe-exceptions, stm
-, tagged, tar, tasty, tasty-expected-failure, tasty-golden
-, tasty-hunit, tasty-quickcheck, text, time, tree-diff, unix, zlib
-}:
-mkDerivation {
-  pname = "cabal-install";
-  version = "3.10.1.0";
-  sha256 = "995de368555449230e0762b259377ed720798717f4dd26a4fa711e8e41c7838d";
-  revision = "1";
-  editedCabalFile = "0h1ra9kw7mk70202whiphbdyvknm7jbhqhkgw4h8abb1sgffhs3n";
-  isLibrary = true;
-  isExecutable = true;
-  libraryHaskellDepends = [
-    array async base base16-bytestring binary bytestring Cabal
-    cabal-install-solver Cabal-syntax containers cryptohash-sha256
-    directory echo edit-distance exceptions filepath hackage-security
-    hashable HTTP lukko mtl network-uri parsec pretty process random
-    regex-base regex-posix resolv safe-exceptions stm tar text time
-    unix zlib
-  ];
-  executableHaskellDepends = [
-    base Cabal Cabal-syntax directory filepath
-  ];
-  testHaskellDepends = [
-    array base bytestring Cabal Cabal-described cabal-install-solver
-    Cabal-QuickCheck Cabal-syntax Cabal-tree-diff containers directory
-    filepath hashable mtl network-uri pretty-show QuickCheck random
-    tagged tar tasty tasty-expected-failure tasty-golden tasty-hunit
-    tasty-quickcheck time tree-diff zlib
-  ];
-  doCheck = false;
-  doHaddock = false;
-  enableExecutableProfiling = false;
-  postInstall = ''
-    mkdir -p $out/share/bash-completion
-    mv bash-completion $out/share/bash-completion/completions
-  '';
-  homepage = "http://www.haskell.org/cabal/";
-  description = "The command-line interface for Cabal and Hackage";
-  license = lib.licenses.bsd3;
-  mainProgram = "cabal";
-}

nix/overlays/cabal-install-solver-3.10.1.0.nix

-{ mkDerivation, array, base, bytestring, Cabal, Cabal-syntax
-, containers, edit-distance, filepath, lib, mtl, pretty, tasty
-, tasty-hunit, tasty-quickcheck, transformers
-}:
-mkDerivation {
-  pname = "cabal-install-solver";
-  version = "3.10.1.0";
-  sha256 = "2c0d9edd4ccd746e9bf8ab4f92b1ecffe2f56eae29395c67ef5ca091a6f49f37";
-  revision = "1";
-  editedCabalFile = "1l3qhaiv0m2xc5vscggd2drinam1k4x0l3vfvvz15xrpvxypdv4d";
-  libraryHaskellDepends = [
-    array base bytestring Cabal Cabal-syntax containers edit-distance
-    filepath mtl pretty transformers
-  ];
-  testHaskellDepends = [
-    base Cabal Cabal-syntax tasty tasty-hunit tasty-quickcheck
-  ];
-  homepage = "http://www.haskell.org/cabal/";
-  description = "The command-line interface for Cabal and Hackage";
-  license = lib.licenses.bsd3;
-  doCheck = false;
-  doHaddock = false;
-}

nix/overlays/directory-1.3.7.0.nix

-{ mkDerivation, base, filepath, lib, time, unix }:
-mkDerivation {
-  pname = "directory";
-  version = "1.3.7.0";
-  sha256 = "9f86bd60a4909eef66907c15fc108883439b8fba3b428fb56aaa056631b62d10";
-  revision = "2";
-  editedCabalFile = "13krvs6zfswr3xndysq1bg7mz9n8mm1w7p4zcx8xjs0jqkm8hiyl";
-  libraryHaskellDepends = [ base filepath time unix ];
-  testHaskellDepends = [ base filepath time unix ];
-  description = "Platform-agnostic library for filesystem operations";
-  license = lib.licenses.bsd3;
-  doCheck = false;
-  doHaddock = false;
-}

nix/overlays/ghc947.nix

-# DO NOT port this expression to hadrian. It is not possible to build a GHC
-# cross compiler with 9.4.* and hadrian.
-{ lib, stdenv, pkgsBuildTarget, pkgsHostTarget, targetPackages
-
-# build-tools
-, bootPkgs
-, autoconf, automake, coreutils, fetchpatch, fetchurl, perl, python3, m4, sphinx
-, xattr, autoSignDarwinBinariesHook
-, bash
-
-, libiconv ? null, ncurses
-, glibcLocales ? null
-
-, # GHC can be built with system libffi or a bundled one.
-  libffi ? null
-
-, useLLVM ? !(stdenv.targetPlatform.isx86
-              || stdenv.targetPlatform.isPower
-              || stdenv.targetPlatform.isSparc
-              || stdenv.targetPlatform.isAarch64)
-, # LLVM is conceptually a run-time-only dependency, but for
-  # non-x86, we need LLVM to bootstrap later stages, so it becomes a
-  # build-time dependency too.
-  buildTargetLlvmPackages, llvmPackages, targetCC
-
-, # If enabled, GHC will be built with the GPL-free but slightly slower native
-  # bignum backend instead of the faster but GPLed gmp backend.
-  enableNativeBignum ? !(lib.meta.availableOn stdenv.hostPlatform gmp
-                         && lib.meta.availableOn stdenv.targetPlatform gmp)
-, gmp
-
-, # If enabled, use -fPIC when compiling static libs.
-  enableRelocatedStaticLibs ? stdenv.targetPlatform != stdenv.hostPlatform
-
-, enableProfiledLibs ? true
-
-, # Whether to build dynamic libs for the standard library (on the target
-  # platform). Static libs are always built.
-  enableShared ? with stdenv.targetPlatform; !isWindows && !useiOSPrebuilt && !isStatic
-
-, # Whether to build terminfo.
-  enableTerminfo ? !stdenv.targetPlatform.isWindows
-
-, # What flavour to build. An empty string indicates no
-  # specific flavour and falls back to ghc default values.
-  ghcFlavour ? lib.optionalString (stdenv.targetPlatform != stdenv.hostPlatform)
-    (if useLLVM then "perf-cross" else "perf-cross-ncg")
-
-, #  Whether to build sphinx documentation.
-  enableDocs ? (
-    # Docs disabled for musl and cross because it's a large task to keep
-    # all `sphinx` dependencies building in those environments.
-    # `sphinx` pulls in among others:
-    # Ruby, Python, Perl, Rust, OpenGL, Xorg, gtk, LLVM.
-    (stdenv.targetPlatform == stdenv.hostPlatform)
-    && !stdenv.hostPlatform.isMusl
-  )
-
-, enableHaddockProgram ?
-    # Disabled for cross; see note [HADDOCK_DOCS].
-    (stdenv.targetPlatform == stdenv.hostPlatform)
-
-, # Whether to disable the large address space allocator
-  # necessary fix for iOS: https://www.reddit.com/r/haskell/comments/4ttdz1/building_an_osxi386_to_iosarm64_cross_compiler/d5qvd67/
-  disableLargeAddressSpace ? stdenv.targetPlatform.isiOS
-}:
-
-assert !enableNativeBignum -> gmp != null;
-
-# Cross cannot currently build the `haddock` program for silly reasons,
-# see note [HADDOCK_DOCS].
-assert (stdenv.targetPlatform != stdenv.hostPlatform) -> !enableHaddockProgram;
-
-let
-  inherit (stdenv) buildPlatform hostPlatform targetPlatform;
-
-  inherit (bootPkgs) ghc;
-
-  # TODO(@Ericson2314) Make unconditional
-  targetPrefix = lib.optionalString
-    (targetPlatform != hostPlatform)
-    "${targetPlatform.config}-";
-
-  buildMK = ''
-    BuildFlavour = ${ghcFlavour}
-    ifneq \"\$(BuildFlavour)\" \"\"
-    include mk/flavours/\$(BuildFlavour).mk
-    endif
-    BUILD_SPHINX_HTML = ${if enableDocs then "YES" else "NO"}
-    BUILD_SPHINX_PDF = NO
-  '' +
-  # Note [HADDOCK_DOCS]:
-  # Unfortunately currently `HADDOCK_DOCS` controls both whether the `haddock`
-  # program is built (which we generally always want to have a complete GHC install)
-  # and whether it is run on the GHC sources to generate hyperlinked source code
-  # (which is impossible for cross-compilation); see:
-  # https://gitlab.haskell.org/ghc/ghc/-/issues/20077
-  # This implies that currently a cross-compiled GHC will never have a `haddock`
-  # program, so it can never generate haddocks for any packages.
-  # If this is solved in the future, we'd like to unconditionally
-  # build the haddock program (removing the `enableHaddockProgram` option).
-  ''
-    HADDOCK_DOCS = ${if enableHaddockProgram then "YES" else "NO"}
-    # Build haddocks for boot packages with hyperlinking
-    EXTRA_HADDOCK_OPTS += --hyperlinked-source --quickjump
-
-    DYNAMIC_GHC_PROGRAMS = ${if enableShared then "YES" else "NO"}
-    BIGNUM_BACKEND = ${if enableNativeBignum then "native" else "gmp"}
-  '' + lib.optionalString (targetPlatform != hostPlatform) ''
-    Stage1Only = ${if targetPlatform.system == hostPlatform.system then "NO" else "YES"}
-    CrossCompilePrefix = ${targetPrefix}
-  '' + lib.optionalString (!enableProfiledLibs) ''
-    GhcLibWays = "v dyn"
-  '' +
-  # -fexternal-dynamic-refs apparently (because it's not clear from the documentation)
-  # makes the GHC RTS able to load static libraries, which may be needed for TemplateHaskell.
-  # This solution was described in https://www.tweag.io/blog/2020-09-30-bazel-static-haskell
-  lib.optionalString enableRelocatedStaticLibs ''
-    GhcLibHcOpts += -fPIC -fexternal-dynamic-refs
-    GhcRtsHcOpts += -fPIC -fexternal-dynamic-refs
-  '' + lib.optionalString targetPlatform.useAndroidPrebuilt ''
-    EXTRA_CC_OPTS += -std=gnu99
-  '';
-
-  # Splicer will pull out correct variations
-  libDeps = platform: lib.optional enableTerminfo ncurses
-    ++ [libffi]
-    ++ lib.optional (!enableNativeBignum) gmp
-    ++ lib.optional (platform.libc != "glibc" && !targetPlatform.isWindows) libiconv;
-
-  # TODO(@sternenseemann): is buildTarget LLVM unnecessary?
-  # GHC doesn't seem to have {LLC,OPT}_HOST
-  toolsForTarget = [
-    pkgsBuildTarget.targetPackages.stdenv.cc
-  ] ++ lib.optional useLLVM buildTargetLlvmPackages.llvm;
-
-  # Sometimes we have to dispatch between the bintools wrapper and the unwrapped
-  # derivation for certain tools depending on the platform.
-  bintoolsFor = {
-    # GHC needs install_name_tool on all darwin platforms. On aarch64-darwin it is
-    # part of the bintools wrapper (due to codesigning requirements), but not on
-    # x86_64-darwin.
-    install_name_tool =
-      if stdenv.targetPlatform.isAarch64
-      then targetCC.bintools
-      else targetCC.bintools.bintools;
-    # Same goes for strip.
-    strip =
-      # TODO(@sternenseemann): also use wrapper if linker == "bfd" or "gold"
-      if stdenv.targetPlatform.isAarch64 && stdenv.targetPlatform.isDarwin
-      then targetCC.bintools
-      else targetCC.bintools.bintools;
-  };
-
-  # Use gold either following the default, or to avoid the BFD linker due to some bugs / perf issues.
-  # But we cannot avoid BFD when using musl libc due to https://sourceware.org/bugzilla/show_bug.cgi?id=23856
-  # see #84670 and #49071 for more background.
-  useLdGold = targetPlatform.linker == "gold" ||
-    (targetPlatform.linker == "bfd" && (targetCC.bintools.bintools.hasGold or false) && !targetPlatform.isMusl);
-
-  # Makes debugging easier to see which variant is at play in `nix-store -q --tree`.
-  variantSuffix = lib.concatStrings [
-    (lib.optionalString stdenv.hostPlatform.isMusl "-musl")
-    (lib.optionalString enableNativeBignum "-native-bignum")
-  ];
-
-in
-
-# C compiler, bintools and LLVM are used at build time, but will also leak into
-# the resulting GHC's settings file and used at runtime. This means that we are
-# currently only able to build GHC if hostPlatform == buildPlatform.
-#assert targetCC == pkgsHostTarget.targetPackages.stdenv.cc;
-assert buildTargetLlvmPackages.llvm == llvmPackages.llvm;
-assert stdenv.targetPlatform.isDarwin -> buildTargetLlvmPackages.clang == llvmPackages.clang;
-
-stdenv.mkDerivation (rec {
-  version = "9.4.7";
-  pname = "${targetPrefix}ghc${variantSuffix}";
-
-  src = fetchurl {
-    url = "https://downloads.haskell.org/ghc/${version}/ghc-${version}-src.tar.xz";
-    sha256 = "06775a52b4d13ac09edc6dabc299fd11e59d8886bbcae450af367baee2684c8f";
-  };
-
-  enableParallelBuilding = true;
-
-  outputs = [ "out" "doc" ];
-
-  patches = [
-    # Don't generate code that doesn't compile when --enable-relocatable is passed to Setup.hs
-    # Can be removed if the Cabal library included with ghc backports the linked fix
-    (fetchpatch {
-      url = "https://github.com/haskell/cabal/commit/6c796218c92f93c95e94d5ec2d077f6956f68e98.patch";
-      stripLen = 1;
-      extraPrefix = "libraries/Cabal/";
-      sha256 = "sha256-yRQ6YmMiwBwiYseC5BsrEtDgFbWvst+maGgDtdD0vAY=";
-    })
-
-  ] ++ lib.optionals (stdenv.targetPlatform.isDarwin && stdenv.targetPlatform.isAarch64) [
-    # Prevent the paths module from emitting symbols that we don't use
-    # when building with separate outputs.
-    #
-    # These cause problems as they're not eliminated by GHC's dead code
-    # elimination on aarch64-darwin. (see
-    # https://github.com/NixOS/nixpkgs/issues/140774 for details).
-    ./Cabal-3.6-3.8-paths-fix-cycle-aarch64-darwin.patch
-  ] ++ (if stdenv.isDarwin
-           then [ # Reverts the linking behavior of GHC to not resolve `-libc++` to `c++`.
-                    (fetchpatch {
-                      url = "https://gist.githubusercontent.com/adinapoli/bf722db15f72763bf79dff13a3104b6f/raw/362da0aa3db5c530e0d276183ba68569f216d65a/ghc947-macOS-loadArchive-fix.patch";
-                      sha256 = "sha256-0tHrkWRKFWUewj3uIA0DujVCXo1qgX2lA5p0MIsAHYs=";
-                    })
-                ]
-           else []);
-
-  postPatch = "patchShebangs .";
-
-  # GHC needs the locale configured during the Haddock phase.
-  LANG = "en_US.UTF-8";
-
-  # GHC is a bit confused on its cross terminology.
-  # TODO(@sternenseemann): investigate coreutils dependencies and pass absolute paths
-  preConfigure = ''
-    echo "=================="
-    echo ${targetCC}
-    echo "=================="
-    for env in $(env | grep '^TARGET_' | sed -E 's|\+?=.*||'); do
-      export "''${env#TARGET_}=''${!env}"
-    done
-    # GHC is a bit confused on its cross terminology, as these would normally be
-    # the *host* tools.
-    export CC="${targetCC}/bin/${targetCC.targetPrefix}cc"
-    export CXX="${targetCC}/bin/${targetCC.targetPrefix}c++"
-    # Use gold to work around https://sourceware.org/bugzilla/show_bug.cgi?id=16177
-    export LD="${targetCC.bintools}/bin/${targetCC.bintools.targetPrefix}ld${lib.optionalString useLdGold ".gold"}"
-    export AS="${targetCC.bintools.bintools}/bin/${targetCC.bintools.targetPrefix}as"
-    export AR="${targetCC.bintools.bintools}/bin/${targetCC.bintools.targetPrefix}ar"
-    export NM="${targetCC.bintools.bintools}/bin/${targetCC.bintools.targetPrefix}nm"
-    export RANLIB="${targetCC.bintools.bintools}/bin/${targetCC.bintools.targetPrefix}ranlib"
-    export READELF="${targetCC.bintools.bintools}/bin/${targetCC.bintools.targetPrefix}readelf"
-    export STRIP="${bintoolsFor.strip}/bin/${bintoolsFor.strip.targetPrefix}strip"
-  '' + lib.optionalString (stdenv.targetPlatform.linker == "cctools") ''
-    export OTOOL="${targetCC.bintools.bintools}/bin/${targetCC.bintools.targetPrefix}otool"
-    export INSTALL_NAME_TOOL="${bintoolsFor.install_name_tool}/bin/${bintoolsFor.install_name_tool.targetPrefix}install_name_tool"
-  '' + lib.optionalString useLLVM ''
-    export LLC="${lib.getBin buildTargetLlvmPackages.llvm}/bin/llc"
-    export OPT="${lib.getBin buildTargetLlvmPackages.llvm}/bin/opt"
-  '' + lib.optionalString (useLLVM && stdenv.targetPlatform.isDarwin) ''
-    # LLVM backend on Darwin needs clang: https://downloads.haskell.org/~ghc/latest/docs/html/users_guide/codegens.html#llvm-code-generator-fllvm
-    export CLANG="${buildTargetLlvmPackages.clang}/bin/${buildTargetLlvmPackages.clang.targetPrefix}clang"
-  '' + ''
-
-    echo -n "${buildMK}" > mk/build.mk
-
-    sed -i -e 's|-isysroot /Developer/SDKs/MacOSX10.5.sdk||' configure
-  '' + lib.optionalString (stdenv.isLinux && hostPlatform.libc == "glibc") ''
-    export LOCALE_ARCHIVE="${glibcLocales}/lib/locale/locale-archive"
-  '' + lib.optionalString (!stdenv.isDarwin) ''
-    export NIX_LDFLAGS+=" -rpath $out/lib/ghc-${version}"
-  '' + lib.optionalString stdenv.isDarwin ''
-    export NIX_LDFLAGS+=" -no_dtrace_dof"
-
-    # GHC tries the host xattr /usr/bin/xattr by default which fails since it expects python to be 2.7
-    export XATTR=${lib.getBin xattr}/bin/xattr
-  '' + lib.optionalString targetPlatform.useAndroidPrebuilt ''
-    sed -i -e '5i ,("armv7a-unknown-linux-androideabi", ("e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64", "cortex-a8", ""))' llvm-targets
-  '' + lib.optionalString targetPlatform.isMusl ''
-      echo "patching llvm-targets for musl targets..."
-      echo "Cloning these existing '*-linux-gnu*' targets:"
-      grep linux-gnu llvm-targets | sed 's/^/  /'
-      echo "(go go gadget sed)"
-      sed -i 's,\(^.*linux-\)gnu\(.*\)$,\0\n\1musl\2,' llvm-targets
-      echo "llvm-targets now contains these '*-linux-musl*' targets:"
-      grep linux-musl llvm-targets | sed 's/^/  /'
-
-      echo "And now patching to preserve '-musleabi' as done with '-gnueabi'"
-      # (aclocal.m4 is actual source, but patch configure as well since we don't re-gen)
-      for x in configure aclocal.m4; do
-        substituteInPlace $x \
-          --replace '*-android*|*-gnueabi*)' \
-                    '*-android*|*-gnueabi*|*-musleabi*)'
-      done
-  ''
-  # HACK: allow bootstrapping with GHC 8.10 which works fine, as we don't have
-  # binary 9.0 packaged. Bootstrapping with 9.2 is broken without hadrian.
-  + ''
-    substituteInPlace configure --replace \
-      'MinBootGhcVersion="9.0"' \
-      'MinBootGhcVersion="8.10"'
-  '';
-
-  # TODO(@Ericson2314): Always pass "--target" and always prefix.
-  configurePlatforms = [ "build" "host" ]
-    ++ lib.optional (targetPlatform != hostPlatform) "target";
-
-  # `--with` flags for libraries needed for RTS linker
-  configureFlags = [
-    "--datadir=$doc/share/doc/ghc"
-    "--with-curses-includes=${ncurses.dev}/include" "--with-curses-libraries=${ncurses.out}/lib"
-  ] ++ lib.optionals (libffi != null) [
-    "--with-system-libffi"
-    "--with-ffi-includes=${targetPackages.libffi.dev}/include"
-    "--with-ffi-libraries=${targetPackages.libffi.out}/lib"
-  ] ++ lib.optionals (targetPlatform == hostPlatform && !enableNativeBignum) [
-    "--with-gmp-includes=${targetPackages.gmp.dev}/include"
-    "--with-gmp-libraries=${targetPackages.gmp.out}/lib"
-  ] ++ lib.optionals (targetPlatform == hostPlatform && hostPlatform.libc != "glibc" && !targetPlatform.isWindows) [
-    "--with-iconv-includes=${libiconv}/include"
-    "--with-iconv-libraries=${libiconv}/lib"
-  ] ++ lib.optionals (targetPlatform != hostPlatform) [
-    "--enable-bootstrap-with-devel-snapshot"
-  ] ++ lib.optionals useLdGold [
-    "CFLAGS=-fuse-ld=gold"
-    "CONF_GCC_LINKER_OPTS_STAGE1=-fuse-ld=gold"
-    "CONF_GCC_LINKER_OPTS_STAGE2=-fuse-ld=gold"
-  ] ++ lib.optionals (disableLargeAddressSpace) [
-    "--disable-large-address-space"
-  ];
-
-  # Make sure we never relax`$PATH` and hooks support for compatibility.
-  strictDeps = true;
-
-  # Don’t add -liconv to LDFLAGS automatically so that GHC will add it itself.
-  dontAddExtraLibs = true;
-
-  nativeBuildInputs = [
-    perl autoconf automake m4 python3
-    ghc bootPkgs.alex bootPkgs.happy bootPkgs.hscolour
-  ] ++ lib.optionals (stdenv.isDarwin && stdenv.isAarch64) [
-    autoSignDarwinBinariesHook
-  ] ++ lib.optionals enableDocs [
-    sphinx
-  ];
-
-  # For building runtime libs
-  depsBuildTarget = toolsForTarget;
-
-  buildInputs = [ perl bash ] ++ (libDeps hostPlatform);
-
-  depsTargetTarget = map lib.getDev (libDeps targetPlatform);
-  depsTargetTargetPropagated = map (lib.getOutput "out") (libDeps targetPlatform);
-
-  # required, because otherwise all symbols from HSffi.o are stripped, and
-  # that in turn causes GHCi to abort
-  stripDebugFlags = [ "-S" ] ++ lib.optional (!targetPlatform.isDarwin) "--keep-file-symbols";
-
-  checkTarget = "test";
-
-  hardeningDisable =
-    [ "format" ]
-    # In nixpkgs, musl based builds currently enable `pie` hardening by default
-    # (see `defaultHardeningFlags` in `make-derivation.nix`).
-    # But GHC cannot currently produce outputs that are ready for `-pie` linking.
-    # Thus, disable `pie` hardening, otherwise `recompile with -fPIE` errors appear.
-    # See:
-    # * https://github.com/NixOS/nixpkgs/issues/129247
-    # * https://gitlab.haskell.org/ghc/ghc/-/issues/19580
-    ++ lib.optional stdenv.targetPlatform.isMusl "pie";
-
-  # big-parallel allows us to build with more than 2 cores on
-  # Hydra which already warrants a significant speedup
-  requiredSystemFeatures = [ "big-parallel" ];
-
-  postInstall = ''
-    # Install the bash completion file.
-    install -D -m 444 utils/completion/ghc.bash $out/share/bash-completion/completions/${targetPrefix}ghc
-  '';
-
-  passthru = {
-    inherit bootPkgs targetPrefix;
-
-    inherit llvmPackages;
-    inherit targetCC;
-    inherit enableShared;
-
-    # This is used by the haskell builder to query
-    # the presence of the haddock program.
-    hasHaddock = enableHaddockProgram;
-
-    # Our Cabal compiler name
-    haskellCompilerName = "ghc-${version}";
-  };
-
-  meta = {
-    homepage = "http://haskell.org/ghc";
-    description = "The Glasgow Haskell Compiler";
-    maintainers = with lib.maintainers; [
-      guibou
-    ] ++ lib.teams.haskell.members;
-    timeout = 24 * 3600;
-    inherit (ghc.meta) license platforms;
-  };
-
-} // lib.optionalAttrs targetPlatform.useAndroidPrebuilt {
-  dontStrip = true;
-  dontPatchELF = true;
-  noAuditTmpdir = true;
-})

nix/overlays/hackage-security-0.6.2.3.nix

-{ mkDerivation, aeson, base, base16-bytestring, base64-bytestring
-, bytestring, Cabal, Cabal-syntax, containers, cryptohash-sha256
-, directory, ed25519, filepath, ghc-prim, lib, lukko, mtl, network
-, network-uri, parsec, pretty, QuickCheck, tar, tasty, tasty-hunit
-, tasty-quickcheck, template-haskell, temporary, text, time
-, transformers, unordered-containers, vector, zlib
-}:
-mkDerivation {
-  pname = "hackage-security";
-  version = "0.6.2.3";
-  sha256 = "52ee0576971955571d846b8e6c09638f89f4f7881f4a95173e44ccc0d856a066";
-  revision = "3";
-  editedCabalFile = "1vdmpklil8a6r03ixzch5d36ngimmq5q8931i8bg9f7hh8nmq8jv";
-  libraryHaskellDepends = [
-    base base16-bytestring base64-bytestring bytestring Cabal
-    Cabal-syntax containers cryptohash-sha256 directory ed25519
-    filepath ghc-prim lukko mtl network network-uri parsec pretty tar
-    template-haskell time transformers zlib
-  ];
-  testHaskellDepends = [
-    aeson base bytestring Cabal Cabal-syntax containers network-uri
-    QuickCheck tar tasty tasty-hunit tasty-quickcheck temporary text
-    time unordered-containers vector zlib
-  ];
-  homepage = "https://github.com/haskell/hackage-security";
-  description = "Hackage security library";
-  license = lib.licenses.bsd3;
-  doCheck = false;
-  doHaddock = false;
-}

nix/overlays/process-1.6.15.0.nix

-{ mkDerivation, base, bytestring, deepseq, directory, filepath, lib
-, unix
-}:
-mkDerivation {
-  pname = "process";
-  version = "1.6.15.0";
-  sha256 = "44b31b6cd3129893ac1a007573dedb69dde667fa06ee108526d58f08b1a1f7ab";
-  libraryHaskellDepends = [ base deepseq directory filepath unix ];
-  testHaskellDepends = [ base bytestring directory ];
-  description = "Process libraries";
-  license = lib.licenses.bsd3;
-  doCheck = false;
-  doHaddock = false;
-}