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 = {