From 4a5ab1eb69f06512371ce89e710b30ab30f54b36 Mon Sep 17 00:00:00 2001
From: Wolfgang Walther <walther@technowledgy.de>
Date: Fri, 5 Sep 2025 13:29:48 +0200
Subject: [PATCH] haskell.compiler.ghc865Binary: drop

This was used for bootstrapping GHC on powerpc64le, but it's unclear
whether that actually still works. It makes no sense to pretend to
support it, when it's most likely broken, but we can't even verify.

Also the bootstrap chain will be broken once we drop GHC 8.10.7, so we
might as well drop the whole thing.
---
 doc/release-notes/rl-2511.section.md          |   2 +
 .../compilers/ghc/8.6.5-binary.nix            | 268 ------------------
 .../configuration-ghc-8.6.x.nix               |  97 -------
 .../haskell-modules/generic-builder.nix       |   2 +-
 pkgs/top-level/haskell-packages.nix           |  70 +----
 pkgs/top-level/release-haskell.nix            |   6 +-
 6 files changed, 11 insertions(+), 434 deletions(-)
 delete mode 100644 pkgs/development/compilers/ghc/8.6.5-binary.nix
 delete mode 100644 pkgs/development/haskell-modules/configuration-ghc-8.6.x.nix

diff --git a/doc/release-notes/rl-2511.section.md b/doc/release-notes/rl-2511.section.md
index 141b887ee05f..12da7843bb40 100644
--- a/doc/release-notes/rl-2511.section.md
+++ b/doc/release-notes/rl-2511.section.md
@@ -24,6 +24,8 @@
 
 - GCC 9, 10, 11, and 12 have been removed, as they have reached end‐of‐life upstream and are no longer supported.
 
+- GHC 8.6.5 and its package set have been removed. It was only used to bootstrap GHC for powerpc64le, but this was probably broken anyway.
+
 - `base16-builder` node package has been removed due to lack of upstream maintenance.
 
 - `python3Packages.bjoern` has been removed, as the upstream is unmaintained and it depends on a 14-year-old version of http-parser with numerous vulnerabilities.
diff --git a/pkgs/development/compilers/ghc/8.6.5-binary.nix b/pkgs/development/compilers/ghc/8.6.5-binary.nix
deleted file mode 100644
index 7c15730205b2..000000000000
--- a/pkgs/development/compilers/ghc/8.6.5-binary.nix
+++ /dev/null
@@ -1,268 +0,0 @@
-{
-  lib,
-  stdenv,
-  fetchurl,
-  perl,
-  gcc,
-  ncurses5,
-  ncurses6,
-  gmp,
-  glibc,
-  libiconv,
-  llvmPackages,
-  coreutils,
-  targetPackages,
-}:
-
-# Prebuilt only does native
-assert stdenv.targetPlatform == stdenv.hostPlatform;
-
-let
-  useLLVM =
-    !(stdenv.targetPlatform.isx86 || stdenv.targetPlatform.isPower || stdenv.targetPlatform.isSparc);
-
-  useNcurses6 =
-    stdenv.hostPlatform.system == "x86_64-linux"
-    || (with stdenv.hostPlatform; isPower64 && isLittleEndian);
-
-  ourNcurses = if useNcurses6 then ncurses6 else ncurses5;
-
-  libPath = lib.makeLibraryPath (
-    [
-      ourNcurses
-      gmp
-    ]
-    ++ lib.optional (stdenv.hostPlatform.isDarwin) libiconv
-  );
-
-  libEnvVar = lib.optionalString stdenv.hostPlatform.isDarwin "DY" + "LD_LIBRARY_PATH";
-
-  glibcDynLinker =
-    assert stdenv.hostPlatform.isLinux;
-    if stdenv.hostPlatform.libc == "glibc" then
-      # Could be stdenv.cc.bintools.dynamicLinker, keeping as-is to avoid rebuild.
-      ''"$(cat $NIX_CC/nix-support/dynamic-linker)"''
-    else
-      "${lib.getLib glibc}/lib/ld-linux*";
-
-  downloadsUrl = "https://downloads.haskell.org/ghc";
-
-  runtimeDeps = [
-    targetPackages.stdenv.cc
-    targetPackages.stdenv.cc.bintools
-    coreutils # for cat
-  ]
-  ++
-    lib.optionals
-      (
-        assert useLLVM -> !(llvmPackages == null);
-        useLLVM
-      )
-      [
-        (lib.getBin llvmPackages.llvm)
-      ]
-  # On darwin, we need unwrapped bintools as well (for otool)
-  ++ lib.optionals (stdenv.targetPlatform.linker == "cctools") [
-    targetPackages.stdenv.cc.bintools.bintools
-  ];
-
-in
-
-stdenv.mkDerivation rec {
-  version = "8.6.5";
-  pname = "ghc-binary";
-
-  # https://downloads.haskell.org/~ghc/8.6.5/
-  src = fetchurl (
-    {
-      i686-linux = {
-        # Don't use the Fedora27 build (as below) because there isn't one!
-        url = "${downloadsUrl}/${version}/ghc-${version}-i386-deb9-linux.tar.xz";
-        sha256 = "1p2h29qghql19ajk755xa0yxkn85slbds8m9n5196ris743vkp8w";
-      };
-      x86_64-linux = {
-        # This is the Fedora build because it links against ncurses6 where the
-        # deb9 one links against ncurses5, see here
-        # https://github.com/NixOS/nixpkgs/issues/85924 for a discussion
-        url = "${downloadsUrl}/${version}/ghc-${version}-x86_64-fedora27-linux.tar.xz";
-        sha256 = "18dlqm5d028fqh6ghzn7pgjspr5smw030jjzl3kq6q1kmwzbay6g";
-      };
-      x86_64-darwin = {
-        url = "${downloadsUrl}/${version}/ghc-${version}-x86_64-apple-darwin.tar.xz";
-        sha256 = "0s9188vhhgf23q3rjarwhbr524z6h2qga5xaaa2pma03sfqvvhfz";
-      };
-      powerpc64le-linux = {
-        url = "https://downloads.haskell.org/~ghc/${version}/ghc-${version}-powerpc64le-fedora29-linux.tar.xz";
-        sha256 = "sha256-tWSsJdPVrCiqDyIKzpBt5DaXb3b6j951tCya584kWs4=";
-      };
-    }
-    .${stdenv.hostPlatform.system} or (throw "cannot bootstrap GHC on this platform")
-  );
-
-  nativeBuildInputs = [ perl ];
-
-  # Cannot patchelf beforehand due to relative RPATHs that anticipate
-  # the final install location/
-  ${libEnvVar} = libPath;
-
-  postUnpack =
-    # GHC has dtrace probes, which causes ld to try to open /usr/lib/libdtrace.dylib
-    # during linking
-    lib.optionalString stdenv.hostPlatform.isDarwin ''
-      export NIX_LDFLAGS+=" -no_dtrace_dof"
-      # not enough room in the object files for the full path to libiconv :(
-      for exe in $(find . -type f -executable); do
-        isScript $exe && continue
-        ln -fs ${libiconv}/lib/libiconv.dylib $(dirname $exe)/libiconv.dylib
-        install_name_tool -change /usr/lib/libiconv.2.dylib @executable_path/libiconv.dylib $exe
-      done
-    ''
-    +
-
-      # Some scripts used during the build need to have their shebangs patched
-      ''
-        patchShebangs ghc-${version}/utils/
-        patchShebangs ghc-${version}/configure
-        test -d ghc-${version}/inplace/bin && \
-          patchShebangs ghc-${version}/inplace/bin
-      ''
-    +
-
-      # We have to patch the GMP paths for the integer-gmp package.
-      ''
-        find . -name integer-gmp.buildinfo \
-            -exec sed -i "s@extra-lib-dirs: @extra-lib-dirs: ${gmp.out}/lib@" {} \;
-      ''
-    + lib.optionalString stdenv.hostPlatform.isDarwin ''
-      find . -name base.buildinfo \
-          -exec sed -i "s@extra-lib-dirs: @extra-lib-dirs: ${libiconv}/lib@" {} \;
-    ''
-    +
-      # Rename needed libraries and binaries, fix interpreter
-      lib.optionalString stdenv.hostPlatform.isLinux ''
-        find . -type f -perm -0100 \
-            -exec patchelf \
-            --replace-needed libncurses${lib.optionalString stdenv.hostPlatform.is64bit "w"}.so.5 libncurses.so \
-            ${
-              # This isn't required for x86_64-linux where we use ncurses6
-              lib.optionalString (!useNcurses6) "--replace-needed libtinfo.so libtinfo.so.5"
-            } \
-            --interpreter ${glibcDynLinker} {} \;
-
-        sed -i "s|/usr/bin/perl|perl\x00        |" ghc-${version}/ghc/stage2/build/tmp/ghc-stage2
-        sed -i "s|/usr/bin/gcc|gcc\x00        |" ghc-${version}/ghc/stage2/build/tmp/ghc-stage2
-      ''
-    +
-      # We're kludging a glibc bindist into working with non-glibc...
-      # Here we patch up the use of `__strdup` (part of glibc binary ABI)
-      # to instead use `strdup` since musl doesn't provide __strdup
-      # (`__strdup` is defined to be an alias of `strdup` anyway[1]).
-      # [1] http://refspecs.linuxbase.org/LSB_4.0.0/LSB-Core-generic/LSB-Core-generic/baselib---strdup-1.html
-      # Use objcopy magic to make the change:
-      lib.optionalString stdenv.hostPlatform.isMusl ''
-        find ./ghc-${version}/rts -name "libHSrts*.a" -exec ''${OBJCOPY:-objcopy} --redefine-sym __strdup=strdup {} \;
-      '';
-
-  configurePlatforms = [ ];
-  configureFlags = [
-    "--with-gmp-includes=${lib.getDev gmp}/include"
-    # Note `--with-gmp-libraries` does nothing for GHC bindists:
-    # https://gitlab.haskell.org/ghc/ghc/-/merge_requests/6124
-  ]
-  ++ lib.optional stdenv.hostPlatform.isDarwin "--with-gcc=${./gcc-clang-wrapper.sh}"
-  ++ lib.optional stdenv.hostPlatform.isMusl "--disable-ld-override";
-
-  # No building is necessary, but calling make without flags ironically
-  # calls install-strip ...
-  dontBuild = true;
-
-  # GHC tries to remove xattrs when installing to work around Gatekeeper
-  # (see https://gitlab.haskell.org/ghc/ghc/-/issues/17418). This step normally
-  # succeeds in nixpkgs because xattrs are not allowed in the store, but it
-  # can fail when a file has the `com.apple.provenance` xattr, and it can’t be
-  # modified (such as target of the symlink to `libiconv.dylib`).
-  # The `com.apple.provenance` xattr is a new feature of macOS as of macOS 13.
-  # See: https://eclecticlight.co/2023/03/13/ventura-has-changed-app-quarantine-with-a-new-xattr/
-  makeFlags = lib.optionals stdenv.buildPlatform.isDarwin [ "XATTR=/does-not-exist" ];
-
-  # Patch scripts to include runtime dependencies in $PATH.
-  postInstall = ''
-    for i in "$out/bin/"*; do
-      test ! -h "$i" || continue
-      isScript "$i" || continue
-      sed -i -e '2i export PATH="${lib.makeBinPath runtimeDeps}:$PATH"' "$i"
-    done
-  '';
-
-  # On Linux, use patchelf to modify the executables so that they can
-  # find editline/gmp.
-  postFixup =
-    lib.optionalString stdenv.hostPlatform.isLinux ''
-      for p in $(find "$out" -type f -executable); do
-        if isELF "$p"; then
-          echo "Patchelfing $p"
-          patchelf --set-rpath "${libPath}:$(patchelf --print-rpath $p)" $p
-        fi
-      done
-    ''
-    + lib.optionalString stdenv.hostPlatform.isDarwin ''
-      # not enough room in the object files for the full path to libiconv :(
-      for exe in $(find "$out" -type f -executable); do
-        isScript $exe && continue
-        ln -fs ${libiconv}/lib/libiconv.dylib $(dirname $exe)/libiconv.dylib
-        install_name_tool -change /usr/lib/libiconv.2.dylib @executable_path/libiconv.dylib $exe
-      done
-
-      for file in $(find "$out" -name setup-config); do
-        substituteInPlace $file --replace /usr/bin/ranlib "$(type -P ranlib)"
-      done
-    '';
-
-  # 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
-  hardeningDisable = [ "pie" ];
-
-  doInstallCheck = true;
-  installCheckPhase = ''
-    # Sanity check, can ghc create executables?
-    cd $TMP
-    mkdir test-ghc; cd test-ghc
-    cat > main.hs << EOF
-      {-# LANGUAGE TemplateHaskell #-}
-      module Main where
-      main = putStrLn \$([|"yes"|])
-    EOF
-    env -i $out/bin/ghc --make main.hs || exit 1
-    echo compilation ok
-    [ $(./main) == "yes" ]
-  '';
-
-  passthru = {
-    targetPrefix = "";
-    enableShared = true;
-
-    inherit llvmPackages;
-
-    # Our Cabal compiler name
-    haskellCompilerName = "ghc-${version}";
-  };
-
-  meta = rec {
-    license = lib.licenses.bsd3;
-    platforms = [
-      "x86_64-linux"
-      "i686-linux"
-      "x86_64-darwin"
-      "powerpc64le-linux"
-    ];
-    # build segfaults, use ghc8107Binary which has proper musl support instead
-    broken = stdenv.hostPlatform.isMusl;
-    maintainers = with lib.maintainers; [
-      guibou
-    ];
-    teams = [ lib.teams.haskell ];
-  };
-}
diff --git a/pkgs/development/haskell-modules/configuration-ghc-8.6.x.nix b/pkgs/development/haskell-modules/configuration-ghc-8.6.x.nix
deleted file mode 100644
index 3258dd341465..000000000000
--- a/pkgs/development/haskell-modules/configuration-ghc-8.6.x.nix
+++ /dev/null
@@ -1,97 +0,0 @@
-{ pkgs, haskellLib }:
-
-with haskellLib;
-
-let
-  inherit (pkgs.stdenv.hostPlatform) isDarwin;
-in
-
-self: super: {
-
-  # Should be llvmPackages_6 which has been removed from nixpkgs,
-  # create attribute set to prevent eval errors.
-  llvmPackages = {
-    llvm = null;
-    clang = null;
-  };
-
-  # Disable GHC 8.6.x core libraries.
-  array = null;
-  base = null;
-  binary = null;
-  bytestring = null;
-  Cabal = null;
-  containers = null;
-  deepseq = null;
-  directory = null;
-  filepath = null;
-  ghc-boot = null;
-  ghc-boot-th = null;
-  ghc-compact = null;
-  ghc-heap = null;
-  ghc-prim = null;
-  ghci = null;
-  haskeline = null;
-  hpc = null;
-  integer-gmp = null;
-  libiserv = null;
-  mtl = null;
-  parsec = null;
-  pretty = null;
-  process = null;
-  rts = null;
-  stm = null;
-  template-haskell = null;
-  # GHC only builds terminfo if it is a native compiler
-  terminfo =
-    if pkgs.stdenv.hostPlatform == pkgs.stdenv.buildPlatform then
-      null
-    else
-      doDistribute self.terminfo_0_4_1_7;
-  text = null;
-  time = null;
-  transformers = null;
-  unix = null;
-  # GHC only bundles the xhtml library if haddock is enabled, check if this is
-  # still the case when updating: https://gitlab.haskell.org/ghc/ghc/-/blob/0198841877f6f04269d6050892b98b5c3807ce4c/ghc.mk#L463
-  xhtml = if self.ghc.hasHaddock or true then null else doDistribute self.xhtml_3000_4_0_0;
-
-  # Need the Cabal-syntax-3.6.0.0 fake package for Cabal < 3.8 to allow callPackage and the constraint solver to work
-  Cabal-syntax = self.Cabal-syntax_3_6_0_0;
-  # These core package only exist for GHC >= 9.4. The best we can do is feign
-  # their existence to callPackages, but their is no shim for lower GHC versions.
-  system-cxx-std-lib = null;
-
-  # Becomes a core package in GHC >= 9.8
-  semaphore-compat = doDistribute self.semaphore-compat_1_0_0;
-
-  # Needs Cabal 3.0.x.
-  jailbreak-cabal = super.jailbreak-cabal.overrideScope (cself: _: { Cabal = cself.Cabal_3_2_1_0; });
-
-  # Test suite does not compile.
-  data-clist = doJailbreak super.data-clist; # won't cope with QuickCheck 2.12.x
-  dates = doJailbreak super.dates; # base >=4.9 && <4.12
-  HaTeX = doJailbreak super.HaTeX; # containers >=0.4 && <0.6 is too tight; https://github.com/Daniel-Diaz/HaTeX/issues/126
-  hpc-coveralls = doJailbreak super.hpc-coveralls; # https://github.com/guillaume-nargeot/hpc-coveralls/issues/82
-  http-api-data = doJailbreak super.http-api-data;
-  wl-pprint-extras = doJailbreak super.wl-pprint-extras; # containers >=0.4 && <0.6 is too tight; https://github.com/ekmett/wl-pprint-extras/issues/17
-  rebase = doJailbreak super.rebase; # time ==1.9.* is too low
-
-  # cabal2nix needs the latest version of Cabal, and the one
-  # hackage-db uses must match, so take the latest
-  cabal2nix = super.cabal2nix.overrideScope (self: super: { Cabal = self.Cabal_3_2_1_0; });
-
-  # cabal2spec needs a recent version of Cabal
-  cabal2spec = super.cabal2spec.overrideScope (self: super: { Cabal = self.Cabal_3_2_1_0; });
-
-  # ghc versions prior to 8.8.x needs additional dependency to compile successfully.
-  ghc-lib-parser-ex = addBuildDepend self.ghc-lib-parser super.ghc-lib-parser-ex;
-
-  # Needs base-orphans for GHC < 9.8 / base < 4.19
-  some = addBuildDepend self.base-orphans super.some;
-
-  # This became a core library in ghc 8.10., so we don’t have an "exception" attribute anymore.
-  exceptions = self.exceptions_0_10_10;
-
-  mime-string = disableOptimization super.mime-string;
-}
diff --git a/pkgs/development/haskell-modules/generic-builder.nix b/pkgs/development/haskell-modules/generic-builder.nix
index 2724a78f692f..f2ea85774d60 100644
--- a/pkgs/development/haskell-modules/generic-builder.nix
+++ b/pkgs/development/haskell-modules/generic-builder.nix
@@ -957,7 +957,7 @@ lib.fix (
         #   # and with python:
         #
         #   > nix-shell -E 'with (import <nixpkgs> {}); \
-        #   >    haskell.packages.ghc865.hello.envFunc { buildInputs = [ python ]; }'
+        #   >    haskellPackages.hello.envFunc { buildInputs = [ python ]; }'
         envFunc =
           {
             withHoogle ? false,
diff --git a/pkgs/top-level/haskell-packages.nix b/pkgs/top-level/haskell-packages.nix
index 4f0de7a6498e..6e4d535f31d1 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -20,7 +20,6 @@ let
     "integer-simple"
     "native-bignum"
     # Binary GHCs
-    "ghc865Binary"
     "ghc8107Binary"
     "ghc902Binary"
     "ghc924Binary"
@@ -79,11 +78,6 @@ in
       bb = pkgsBuildBuild.haskell;
     in
     {
-      ghc865Binary = callPackage ../development/compilers/ghc/8.6.5-binary.nix {
-        # Should be llvmPackages_6 which has been removed from nixpkgs
-        llvmPackages = null;
-      };
-
       ghc8107Binary = callPackage ../development/compilers/ghc/8.10.7-binary.nix {
         llvmPackages = pkgs.llvmPackages_12;
       };
@@ -105,13 +99,7 @@ in
       };
 
       ghc8107 = callPackage ../development/compilers/ghc/8.10.7.nix {
-        bootPkgs =
-          # the oldest ghc with aarch64-darwin support is 8.10.5
-          if stdenv.buildPlatform.isPower64 && stdenv.buildPlatform.isLittleEndian then
-            # to my (@a-m-joseph) knowledge there are no newer official binaries for this platform
-            bb.packages.ghc865Binary
-          else
-            bb.packages.ghc8107Binary;
+        bootPkgs = bb.packages.ghc8107Binary;
         inherit (buildPackages.python311Packages) sphinx; # a distutils issue with 3.12
         python3 = buildPackages.python311; # so that we don't have two of them
         # Need to use apple's patched xattr until
@@ -123,12 +111,7 @@ in
       };
       ghc810 = compiler.ghc8107;
       ghc902 = callPackage ../development/compilers/ghc/9.0.2.nix {
-        bootPkgs =
-          # the oldest ghc with aarch64-darwin support is 8.10.5
-          if stdenv.buildPlatform.isPower64 && stdenv.buildPlatform.isLittleEndian then
-            bb.packages.ghc810
-          else
-            bb.packages.ghc8107Binary;
+        bootPkgs = bb.packages.ghc8107Binary;
         inherit (buildPackages.python311Packages) sphinx; # a distutils issue with 3.12
         python3 = buildPackages.python311; # so that we don't have two of them
         inherit (buildPackages.darwin) autoSignDarwinBinariesHook xattr;
@@ -139,13 +122,7 @@ in
       ghc928 = callPackage ../development/compilers/ghc/9.2.8.nix {
         bootPkgs =
           # GHC >= 9.0 removed the armv7l bindist
-          if stdenv.buildPlatform.isAarch32 then
-            bb.packages.ghc8107Binary
-          # No suitable bindists for powerpc64le
-          else if stdenv.buildPlatform.isPower64 && stdenv.buildPlatform.isLittleEndian then
-            bb.packages.ghc902
-          else
-            bb.packages.ghc902Binary;
+          if stdenv.buildPlatform.isAarch32 then bb.packages.ghc8107Binary else bb.packages.ghc902Binary;
         inherit (buildPackages.python311Packages) sphinx; # a distutils issue with 3.12
         python3 = buildPackages.python311; # so that we don't have two of them
         # Need to use apple's patched xattr until
@@ -160,12 +137,7 @@ in
         bootPkgs =
           # Building with 9.2 is broken due to
           # https://gitlab.haskell.org/ghc/ghc/-/issues/21914
-
-          # No suitable bindists for powerpc64le
-          if stdenv.buildPlatform.isPower64 && stdenv.buildPlatform.isLittleEndian then
-            bb.packages.ghc902
-          else
-            bb.packages.ghc902Binary;
+          bb.packages.ghc902Binary;
         inherit (buildPackages.python3Packages) sphinx;
         # Need to use apple's patched xattr until
         # https://github.com/xattr/xattr/issues/44 and
@@ -179,12 +151,7 @@ in
       ghc963 = callPackage ../development/compilers/ghc/9.6.3.nix {
         bootPkgs =
           # For GHC 9.2 no armv7l bindists are available.
-          if stdenv.buildPlatform.isAarch32 then
-            bb.packages.ghc928
-          else if stdenv.buildPlatform.isPower64 && stdenv.buildPlatform.isLittleEndian then
-            bb.packages.ghc928
-          else
-            bb.packages.ghc924Binary;
+          if stdenv.buildPlatform.isAarch32 then bb.packages.ghc928 else bb.packages.ghc924Binary;
         inherit (buildPackages.python3Packages) sphinx;
         # Need to use apple's patched xattr until
         # https://github.com/xattr/xattr/issues/44 and
@@ -197,12 +164,7 @@ in
       ghc967 = callPackage ../development/compilers/ghc/9.6.7.nix {
         bootPkgs =
           # For GHC 9.2 no armv7l bindists are available.
-          if stdenv.buildPlatform.isAarch32 then
-            bb.packages.ghc928
-          else if stdenv.buildPlatform.isPower64 && stdenv.buildPlatform.isLittleEndian then
-            bb.packages.ghc928
-          else
-            bb.packages.ghc924Binary;
+          if stdenv.buildPlatform.isAarch32 then bb.packages.ghc928 else bb.packages.ghc924Binary;
         inherit (buildPackages.python3Packages) sphinx;
         # Need to use apple's patched xattr until
         # https://github.com/xattr/xattr/issues/44 and
@@ -220,8 +182,6 @@ in
           else if stdenv.buildPlatform.isAarch32 then
             # For GHC 9.6 no armv7l bindists are available.
             bb.packages.ghc963
-          else if stdenv.buildPlatform.isPower64 && stdenv.buildPlatform.isLittleEndian then
-            bb.packages.ghc963
           else
             bb.packages.ghc963Binary;
         inherit (buildPackages.python3Packages) sphinx;
@@ -239,8 +199,6 @@ in
           # For GHC 9.6 no armv7l bindists are available.
           if stdenv.buildPlatform.isAarch32 then
             bb.packages.ghc963
-          else if stdenv.buildPlatform.isPower64 && stdenv.buildPlatform.isLittleEndian then
-            bb.packages.ghc963
           else if stdenv.buildPlatform.isDarwin then
             # it seems like the GHC 9.6.* bindists are built with a different
             # toolchain than we are using (which I'm guessing from the fact
@@ -264,8 +222,6 @@ in
           # For GHC 9.6 no armv7l bindists are available.
           if stdenv.buildPlatform.isAarch32 then
             bb.packages.ghc963
-          else if stdenv.buildPlatform.isPower64 && stdenv.buildPlatform.isLittleEndian then
-            bb.packages.ghc963
           else if stdenv.buildPlatform.isDarwin then
             # it seems like the GHC 9.6.* bindists are built with a different
             # toolchain than we are using (which I'm guessing from the fact
@@ -315,12 +271,7 @@ in
       ghcHEAD = callPackage ../development/compilers/ghc/head.nix {
         bootPkgs =
           # No armv7l bindists are available.
-          if stdenv.buildPlatform.isAarch32 then
-            bb.packages.ghc984
-          else if stdenv.buildPlatform.isPower64 && stdenv.buildPlatform.isLittleEndian then
-            bb.packages.ghc984
-          else
-            bb.packages.ghc984Binary;
+          if stdenv.buildPlatform.isAarch32 then bb.packages.ghc984 else bb.packages.ghc984Binary;
         inherit (buildPackages.python3Packages) sphinx;
         # Need to use apple's patched xattr until
         # https://github.com/xattr/xattr/issues/44 and
@@ -374,13 +325,6 @@ in
       bh = buildPackages.haskell;
     in
     {
-
-      ghc865Binary = callPackage ../development/haskell-modules {
-        buildHaskellPackages = bh.packages.ghc865Binary;
-        ghc = bh.compiler.ghc865Binary;
-        compilerConfig = callPackage ../development/haskell-modules/configuration-ghc-8.6.x.nix { };
-        packageSetConfig = bootstrapPackageSet;
-      };
       ghc8107Binary = callPackage ../development/haskell-modules {
         buildHaskellPackages = bh.packages.ghc8107Binary;
         ghc = bh.compiler.ghc8107Binary;
diff --git a/pkgs/top-level/release-haskell.nix b/pkgs/top-level/release-haskell.nix
index 9f045ae77346..482923ed7518 100644
--- a/pkgs/top-level/release-haskell.nix
+++ b/pkgs/top-level/release-haskell.nix
@@ -384,11 +384,7 @@ let
             "aarch64-darwin"
           ]
           {
-            haskell.compiler = lib.recursiveUpdate (packagePlatforms pkgs.pkgsMusl.haskell.compiler) {
-              # remove musl ghc865Binary since it is known to be broken and
-              # causes an evaluation error on darwin.
-              ghc865Binary = { };
-            };
+            haskell.compiler = packagePlatforms pkgs.pkgsMusl.haskell.compiler;
 
             # Get some cache going for MUSL-enabled GHC.
             haskellPackages = {