diff --git a/doc/languages-frameworks/dhall.section.md b/doc/languages-frameworks/dhall.section.md
index 83fe2e9ae0c42..846b8cfd3163b 100644
--- a/doc/languages-frameworks/dhall.section.md
+++ b/doc/languages-frameworks/dhall.section.md
@@ -307,12 +307,12 @@ $ nix-env --install --attr haskellPackages.dhall-nixpkgs
 
 $ nix-env --install --attr nix-prefetch-git  # Used by dhall-to-nixpkgs
 
-$ dhall-to-nixpkgs github https://github.com/Gabriel439/dhall-semver.git
+$ dhall-to-nixpkgs github https://github.com/Gabriella439/dhall-semver.git
 { buildDhallGitHubPackage, Prelude }:
   buildDhallGitHubPackage {
     name = "dhall-semver";
     githubBase = "github.com";
-    owner = "Gabriel439";
+    owner = "Gabriella439";
     repo = "dhall-semver";
     rev = "2d44ae605302ce5dc6c657a1216887fbb96392a4";
     fetchSubmodules = false;
diff --git a/doc/languages-frameworks/haskell.section.md b/doc/languages-frameworks/haskell.section.md
index a36843c97c61e..894eba1494e5a 100644
--- a/doc/languages-frameworks/haskell.section.md
+++ b/doc/languages-frameworks/haskell.section.md
@@ -276,6 +276,15 @@ Defaults to `true`.
 : Whether to generate an index for interactive navigation of the HTML documentation.
 Defaults to `true` if supported.
 
+`doInstallIntermediates`
+: Whether to install intermediate build products (files written to `dist/build`
+by GHC during the build process). With `enableSeparateIntermediatesOutput`,
+these files are instead installed to [a separate `intermediates`
+output.][multiple-outputs] The output can then be passed into a future build of
+the same package with the `previousIntermediates` argument to support
+incremental builds. See [“Incremental builds”](#haskell-incremental-builds) for
+more information. Defaults to `false`.
+
 `enableLibraryProfiling`
 : Whether to enable [profiling][profiling] for libraries contained in the
 package. Enabled by default if supported.
@@ -371,6 +380,12 @@ Defaults to `false`.
 : Whether to install documentation to a separate `doc` output.
 Is automatically enabled if `doHaddock` is `true`.
 
+`enableSeparateIntermediatesOutput`
+: When `doInstallIntermediates` is true, whether to install intermediate build
+products to a separate `intermediates` output. See [“Incremental
+builds”](#haskell-incremental-builds) for more information. Defaults to
+`false`.
+
 `allowInconsistentDependencies`
 : If enabled, allow multiple versions of the same Haskell package in the
 dependency tree at configure time. Often in such a situation compilation would
@@ -381,6 +396,11 @@ later fail because of type mismatches. Defaults to `false`.
 when loading the library in the REPL, but requires extra build time and
 disk space. Defaults to `false`.
 
+`previousIntermediates`
+: If non-null, intermediate build artifacts are copied from this input to
+`dist/build` before performing compiling. See [“Incremental
+builds”](#haskell-incremental-builds) for more information. Defaults to `null`.
+
 `buildTarget`
 : Name of the executable or library to build and install.
 If unset, all available targets are built and installed.
@@ -496,6 +516,54 @@ the [Meta-attributes section](#chap-meta) for their documentation.
     * `broken`
     * `hydraPlatforms`
 
+### Incremental builds {#haskell-incremental-builds}
+
+`haskellPackages.mkDerivation` supports incremental builds for GHC 9.4 and
+newer with the `doInstallIntermediates`, `enableSeparateIntermediatesOutput`,
+and `previousIntermediates` arguments.
+
+The basic idea is to first perform a full build of the package in question,
+save its intermediate build products for later, and then copy those build
+products into the build directory of an incremental build performed later.
+Then, GHC will use those build artifacts to avoid recompiling unchanged
+modules.
+
+For more detail on how to store and use incremental build products, see
+[Gabriella Gonzalez’ blog post “Nixpkgs support for incremental Haskell
+builds”.][incremental-builds] motivation behind this feature.
+
+An incremental build for [the `turtle` package][turtle] can be performed like
+so:
+
+```nix
+let
+  pkgs = import <nixpkgs> {};
+  inherit (pkgs) haskell;
+  inherit (haskell.lib.compose) overrideCabal;
+
+  # Incremental builds work with GHC >=9.4.
+  turtle = haskell.packages.ghc944.turtle;
+
+  # This will do a full build of `turtle`, while writing the intermediate build products
+  # (compiled modules, etc.) to the `intermediates` output.
+  turtle-full-build-with-incremental-output = overrideCabal (drv: {
+    doInstallIntermediates = true;
+    enableSeparateIntermediatesOutput = true;
+  }) turtle;
+
+  # This will do an incremental build of `turtle` by copying the previously
+  # compiled modules and intermediate build products into the source tree
+  # before running the build.
+  #
+  # GHC will then naturally pick up and reuse these products, making this build
+  # complete much more quickly than the previous one.
+  turtle-incremental-build = overrideCabal (drv: {
+    previousIntermediates = turtle-full-build-with-incremental-output.intermediates;
+  }) turtle;
+in
+  turtle-incremental-build
+```
+
 ## Development environments {#haskell-development-environments}
 
 In addition to building and installing Haskell software, nixpkgs can also
@@ -1083,8 +1151,11 @@ on the issue linked above.
 [haskell.nix]: https://input-output-hk.github.io/haskell.nix/index.html
 [HLS user guide]: https://haskell-language-server.readthedocs.io/en/latest/configuration.html#configuring-your-editor
 [hoogle]: https://wiki.haskell.org/Hoogle
+[incremental-builds]: https://www.haskellforall.com/2022/12/nixpkgs-support-for-incremental-haskell.html
 [jailbreak-cabal]: https://github.com/NixOS/jailbreak-cabal/
+[multiple-outputs]: https://nixos.org/manual/nixpkgs/stable/#chap-multiple-output
 [optparse-applicative-completions]: https://github.com/pcapriotti/optparse-applicative/blob/7726b63796aa5d0df82e926d467f039b78ca09e2/README.md#bash-zsh-and-fish-completions
 [profiling-detail]: https://cabal.readthedocs.io/en/latest/cabal-project.html#cfg-field-profiling-detail
 [profiling]: https://downloads.haskell.org/~ghc/latest/docs/html/users_guide/profiling.html
 [search.nixos.org]: https://search.nixos.org
+[turtle]: https://hackage.haskell.org/package/turtle
diff --git a/maintainers/maintainer-list.nix b/maintainers/maintainer-list.nix
index ae163ca951fa3..4c6d09d07d5f1 100644
--- a/maintainers/maintainer-list.nix
+++ b/maintainers/maintainer-list.nix
@@ -5524,18 +5524,18 @@
     githubId = 606000;
     name = "Gabriel Adomnicai";
   };
-  Gabriel439 = {
-    email = "Gabriel439@gmail.com";
-    github = "Gabriella439";
-    githubId = 1313787;
-    name = "Gabriel Gonzalez";
-  };
   GabrielDougherty = {
     email = "contact@gabrieldougherty.com";
     github = "GabrielDougherty";
     githubId = 10541219;
     name = "Gabriel Dougherty";
   };
+  Gabriella439 = {
+    email = "GenuineGabriella@gmail.com";
+    github = "Gabriella439";
+    githubId = 1313787;
+    name = "Gabriella Gonzalez";
+  };
   gador = {
     email = "florian.brandes@posteo.de";
     github = "gador";
diff --git a/maintainers/team-list.nix b/maintainers/team-list.nix
index 294b7e51717be..14683ec601828 100644
--- a/maintainers/team-list.nix
+++ b/maintainers/team-list.nix
@@ -213,7 +213,7 @@ with lib.maintainers; {
 
   dhall = {
     members = [
-      Gabriel439
+      Gabriella439
       ehmry
     ];
     scope = "Maintain Dhall and related packages.";
@@ -556,6 +556,15 @@ with lib.maintainers; {
     shortName = "Minimal Bootstrap";
   };
 
+  mercury = {
+    members = [
+      _9999years
+      Gabriella439
+    ];
+    scope = "Group registry for packages maintained by Mercury";
+    shortName = "Mercury Employees";
+  };
+
   mobile = {
     members = [
       samueldr
diff --git a/pkgs/development/haskell-modules/configuration-hackage2nix/main.yaml b/pkgs/development/haskell-modules/configuration-hackage2nix/main.yaml
index 111c46d62161d..496245c10a3b0 100644
--- a/pkgs/development/haskell-modules/configuration-hackage2nix/main.yaml
+++ b/pkgs/development/haskell-modules/configuration-hackage2nix/main.yaml
@@ -202,7 +202,7 @@ package-maintainers:
     - vulkan-utils
   erictapen:
     - hakyll
-  Gabriel439:
+  Gabriella439:
     - annah
     - bench
     - break
diff --git a/pkgs/development/haskell-modules/generic-builder.nix b/pkgs/development/haskell-modules/generic-builder.nix
index 55b7d8cd46dc0..207025d98d713 100644
--- a/pkgs/development/haskell-modules/generic-builder.nix
+++ b/pkgs/development/haskell-modules/generic-builder.nix
@@ -31,6 +31,7 @@ in
 , doBenchmark ? false
 , doHoogle ? true
 , doHaddockQuickjump ? doHoogle && lib.versionAtLeast ghc.version "8.6"
+, doInstallIntermediates ? false
 , editedCabalFile ? null
 # aarch64 outputs otherwise exceed 2GB limit
 , enableLibraryProfiling ? !(ghc.isGhcjs or stdenv.targetPlatform.isAarch64 or false)
@@ -84,6 +85,7 @@ in
 , enableSeparateBinOutput ? false
 , enableSeparateDataOutput ? false
 , enableSeparateDocOutput ? doHaddock
+, enableSeparateIntermediatesOutput ? false
 , # Don't fail at configure time if there are multiple versions of the
   # same package in the (recursive) dependencies of the package being
   # built. Will delay failures, if any, to compile time.
@@ -93,6 +95,10 @@ in
   # This can make it slightly faster to load this library into GHCi, but takes
   # extra disk space and compile time.
   enableLibraryForGhci ? false
+  # Set this to a previous build of this same package to reuse the intermediate
+  # build products from that prior build as a starting point for accelerating
+  # this build
+, previousIntermediates ? null
 } @ args:
 
 assert editedCabalFile != null -> revision != null;
@@ -240,6 +246,8 @@ let
     "--ghc-options=-haddock"
   ];
 
+  postPhases = optional doInstallIntermediates [ "installIntermediatesPhase" ];
+
   setupCompileFlags = [
     (optionalString (!coreSetup) "-${nativePackageDbFlag}=$setupPackageConfDir")
     (optionalString enableParallelBuilding (parallelBuildingFlags))
@@ -306,6 +314,8 @@ let
       continue
     fi
   '';
+
+  intermediatesDir = "share/haskell/${ghc.version}/${pname}-${version}/dist";
 in lib.fix (drv:
 
 assert allPkgconfigDepends != [] -> pkg-config != null;
@@ -316,7 +326,9 @@ stdenv.mkDerivation ({
   outputs = [ "out" ]
          ++ (optional enableSeparateDataOutput "data")
          ++ (optional enableSeparateDocOutput "doc")
-         ++ (optional enableSeparateBinOutput "bin");
+         ++ (optional enableSeparateBinOutput "bin")
+         ++ (optional enableSeparateIntermediatesOutput "intermediates");
+
   setOutputFlags = false;
 
   pos = builtins.unsafeGetAttrPos "pname" args;
@@ -393,7 +405,13 @@ stdenv.mkDerivation ({
   # only use the links hack if we're actually building dylibs. otherwise, the
   # "dynamic-library-dirs" point to nonexistent paths, and the ln command becomes
   # "ln -s $out/lib/links", which tries to recreate the links dir and fails
-  + (optionalString (stdenv.isDarwin && (enableSharedLibraries || enableSharedExecutables)) ''
+  #
+  # Note: We need to disable this work-around when using intermediate build
+  # products from a prior build because otherwise Nix will change permissions on
+  # the `$out/lib/links` directory to read-only when the build is done after the
+  # dist directory has already been exported, which triggers an unnecessary
+  # rebuild of modules included in the exported dist directory.
+  + (optionalString (stdenv.isDarwin && (enableSharedLibraries || enableSharedExecutables) && !enableSeparateIntermediatesOutput) ''
     # Work around a limit in the macOS Sierra linker on the number of paths
     # referenced by any one dynamic library:
     #
@@ -471,11 +489,22 @@ stdenv.mkDerivation ({
     runHook postConfigure
   '';
 
-  buildPhase = ''
-    runHook preBuild
-    ${setupCommand} build ${buildTarget}${crossCabalFlagsString}${buildFlagsString}
-    runHook postBuild
-  '';
+  buildPhase =
+      ''
+      runHook preBuild
+      ''
+    + lib.optionalString (previousIntermediates != null)
+        ''
+        mkdir -p dist;
+        rm -r dist/build
+        cp -r ${previousIntermediates}/${intermediatesDir}/build dist/build
+        find dist/build -exec chmod u+w {} +
+        find dist/build -exec touch -d '1970-01-01T00:00:00Z' {} +
+        ''
+    + ''
+      ${setupCommand} build ${buildTarget}${crossCabalFlagsString}${buildFlagsString}
+      runHook postBuild
+      '';
 
   inherit doCheck;
 
@@ -558,6 +587,15 @@ stdenv.mkDerivation ({
     runHook postInstall
   '';
 
+  ${if doInstallIntermediates then "installIntermediatesPhase" else null} = ''
+    runHook preInstallIntermediates
+    intermediatesOutput=${if enableSeparateIntermediatesOutput then "$intermediates" else "$out"}
+    installIntermediatesDir="$intermediatesOutput/${intermediatesDir}"
+    mkdir -p "$installIntermediatesDir"
+    cp -r dist/build "$installIntermediatesDir"
+    runHook postInstallIntermediates
+  '';
+
   passthru = passthru // rec {
 
     inherit pname version;
@@ -719,6 +757,7 @@ stdenv.mkDerivation ({
 // optionalAttrs (args ? preFixup)               { inherit preFixup; }
 // optionalAttrs (args ? postFixup)              { inherit postFixup; }
 // optionalAttrs (args ? dontStrip)              { inherit dontStrip; }
+// optionalAttrs (postPhases != [])              { inherit postPhases; }
 // optionalAttrs (stdenv.buildPlatform.libc == "glibc"){ LOCALE_ARCHIVE = "${glibcLocales}/lib/locale/locale-archive"; }
 )
 )
diff --git a/pkgs/development/haskell-modules/hackage-packages.nix b/pkgs/development/haskell-modules/hackage-packages.nix
index 192ed28855261..1d8110d9a90b5 100644
--- a/pkgs/development/haskell-modules/hackage-packages.nix
+++ b/pkgs/development/haskell-modules/hackage-packages.nix
@@ -32052,7 +32052,7 @@ self: {
        license = lib.licenses.bsd3;
        hydraPlatforms = lib.platforms.none;
        mainProgram = "annah";
-       maintainers = [ lib.maintainers.Gabriel439 ];
+       maintainers = [ lib.maintainers.Gabriella439 ];
      }) {};
 
   "annihilator" = callPackage
@@ -42753,7 +42753,7 @@ self: {
        description = "Command-line benchmark tool";
        license = lib.licenses.bsd3;
        mainProgram = "bench";
-       maintainers = [ lib.maintainers.Gabriel439 ];
+       maintainers = [ lib.maintainers.Gabriella439 ];
      }) {};
 
   "bench-graph" = callPackage
@@ -49326,7 +49326,7 @@ self: {
        libraryHaskellDepends = [ base mtl transformers ];
        description = "Break from a loop";
        license = lib.licenses.bsd3;
-       maintainers = [ lib.maintainers.Gabriel439 ];
+       maintainers = [ lib.maintainers.Gabriella439 ];
      }) {};
 
   "breakout" = callPackage
@@ -80784,7 +80784,7 @@ self: {
        license = lib.licenses.bsd3;
        hydraPlatforms = lib.platforms.none;
        mainProgram = "dhall";
-       maintainers = [ lib.maintainers.Gabriel439 ];
+       maintainers = [ lib.maintainers.Gabriella439 ];
      }) {};
 
   "dhall_1_38_1" = callPackage
@@ -80843,7 +80843,7 @@ self: {
        license = lib.licenses.bsd3;
        hydraPlatforms = lib.platforms.none;
        mainProgram = "dhall";
-       maintainers = [ lib.maintainers.Gabriel439 ];
+       maintainers = [ lib.maintainers.Gabriella439 ];
      }) {};
 
   "dhall" = callPackage
@@ -80929,7 +80929,7 @@ self: {
        description = "A configuration language guaranteed to terminate";
        license = lib.licenses.bsd3;
        mainProgram = "dhall";
-       maintainers = [ lib.maintainers.Gabriel439 ];
+       maintainers = [ lib.maintainers.Gabriella439 ];
      }) {};
 
   "dhall_1_42_0" = callPackage
@@ -81015,7 +81015,7 @@ self: {
        license = lib.licenses.bsd3;
        hydraPlatforms = lib.platforms.none;
        mainProgram = "dhall";
-       maintainers = [ lib.maintainers.Gabriel439 ];
+       maintainers = [ lib.maintainers.Gabriella439 ];
      }) {};
 
   "dhall-bash" = callPackage
@@ -81040,7 +81040,7 @@ self: {
        description = "Compile Dhall to Bash";
        license = lib.licenses.bsd3;
        mainProgram = "dhall-to-bash";
-       maintainers = [ lib.maintainers.Gabriel439 ];
+       maintainers = [ lib.maintainers.Gabriella439 ];
      }) {};
 
   "dhall-bash_1_0_41" = callPackage
@@ -81066,7 +81066,7 @@ self: {
        license = lib.licenses.bsd3;
        hydraPlatforms = lib.platforms.none;
        mainProgram = "dhall-to-bash";
-       maintainers = [ lib.maintainers.Gabriel439 ];
+       maintainers = [ lib.maintainers.Gabriella439 ];
      }) {};
 
   "dhall-check" = callPackage
@@ -81150,7 +81150,7 @@ self: {
        description = "Generate HTML docs from a dhall package";
        license = lib.licenses.bsd3;
        mainProgram = "dhall-docs";
-       maintainers = [ lib.maintainers.Gabriel439 ];
+       maintainers = [ lib.maintainers.Gabriella439 ];
      }) {};
 
   "dhall-fly" = callPackage
@@ -81217,7 +81217,7 @@ self: {
        ];
        description = "Convert between Dhall and JSON or YAML";
        license = lib.licenses.bsd3;
-       maintainers = [ lib.maintainers.Gabriel439 ];
+       maintainers = [ lib.maintainers.Gabriella439 ];
      }) {};
 
   "dhall-json_1_7_12" = callPackage
@@ -81248,7 +81248,7 @@ self: {
        description = "Convert between Dhall and JSON or YAML";
        license = lib.licenses.bsd3;
        hydraPlatforms = lib.platforms.none;
-       maintainers = [ lib.maintainers.Gabriel439 ];
+       maintainers = [ lib.maintainers.Gabriella439 ];
      }) {};
 
   "dhall-lex" = callPackage
@@ -81298,7 +81298,7 @@ self: {
        description = "Language Server Protocol (LSP) server for Dhall";
        license = lib.licenses.mit;
        mainProgram = "dhall-lsp-server";
-       maintainers = [ lib.maintainers.Gabriel439 ];
+       maintainers = [ lib.maintainers.Gabriella439 ];
      }) {};
 
   "dhall-nix" = callPackage
@@ -81323,7 +81323,7 @@ self: {
        description = "Dhall to Nix compiler";
        license = lib.licenses.bsd3;
        mainProgram = "dhall-to-nix";
-       maintainers = [ lib.maintainers.Gabriel439 ];
+       maintainers = [ lib.maintainers.Gabriella439 ];
      }) {};
 
   "dhall-nix_1_1_26" = callPackage
@@ -81347,7 +81347,7 @@ self: {
        license = lib.licenses.bsd3;
        hydraPlatforms = lib.platforms.none;
        mainProgram = "dhall-to-nix";
-       maintainers = [ lib.maintainers.Gabriel439 ];
+       maintainers = [ lib.maintainers.Gabriella439 ];
      }) {};
 
   "dhall-nixpkgs" = callPackage
@@ -81373,7 +81373,7 @@ self: {
        description = "Convert Dhall projects to Nix packages";
        license = lib.licenses.bsd3;
        mainProgram = "dhall-to-nixpkgs";
-       maintainers = [ lib.maintainers.Gabriel439 ];
+       maintainers = [ lib.maintainers.Gabriella439 ];
      }) {};
 
   "dhall-nixpkgs_1_0_10" = callPackage
@@ -81398,7 +81398,7 @@ self: {
        license = lib.licenses.bsd3;
        hydraPlatforms = lib.platforms.none;
        mainProgram = "dhall-to-nixpkgs";
-       maintainers = [ lib.maintainers.Gabriel439 ];
+       maintainers = [ lib.maintainers.Gabriella439 ];
      }) {};
 
   "dhall-openapi" = callPackage
@@ -81424,7 +81424,7 @@ self: {
        description = "Convert an OpenAPI specification to a Dhall package";
        license = lib.licenses.bsd3;
        mainProgram = "openapi-to-dhall";
-       maintainers = [ lib.maintainers.Gabriel439 ];
+       maintainers = [ lib.maintainers.Gabriella439 ];
      }) {};
 
   "dhall-recursive-adt" = callPackage
@@ -81494,7 +81494,7 @@ self: {
        license = lib.licenses.bsd3;
        hydraPlatforms = lib.platforms.none;
        mainProgram = "dhall-to-text";
-       maintainers = [ lib.maintainers.Gabriel439 ];
+       maintainers = [ lib.maintainers.Gabriella439 ];
        broken = true;
      }) {};
 
@@ -81599,7 +81599,7 @@ self: {
        ];
        description = "Convert between Dhall and YAML";
        license = lib.licenses.gpl3Only;
-       maintainers = [ lib.maintainers.Gabriel439 ];
+       maintainers = [ lib.maintainers.Gabriella439 ];
      }) {};
 
   "dhcp-lease-parser" = callPackage
@@ -83789,7 +83789,7 @@ self: {
        ];
        description = "Easily stream directory contents in constant memory";
        license = lib.licenses.bsd3;
-       maintainers = [ lib.maintainers.Gabriel439 ];
+       maintainers = [ lib.maintainers.Gabriella439 ];
      }) {};
 
   "dirtree" = callPackage
@@ -94050,7 +94050,7 @@ self: {
        ];
        description = "Simplified error-handling";
        license = lib.licenses.bsd3;
-       maintainers = [ lib.maintainers.Gabriel439 ];
+       maintainers = [ lib.maintainers.Gabriella439 ];
      }) {};
 
   "errors-ext" = callPackage
@@ -103672,7 +103672,7 @@ self: {
        benchmarkHaskellDepends = [ base criterion ];
        description = "Composable, streaming, and efficient left folds";
        license = lib.licenses.bsd3;
-       maintainers = [ lib.maintainers.Gabriel439 ];
+       maintainers = [ lib.maintainers.Gabriella439 ];
      }) {};
 
   "foldl-exceptions" = callPackage
@@ -163566,7 +163566,7 @@ self: {
        description = "Indexed Types";
        license = lib.licenses.bsd3;
        hydraPlatforms = lib.platforms.none;
-       maintainers = [ lib.maintainers.Gabriel439 ];
+       maintainers = [ lib.maintainers.Gabriella439 ];
        broken = true;
      }) {};
 
@@ -180123,7 +180123,7 @@ self: {
        description = "Tutorial for the lens library";
        license = lib.licenses.bsd3;
        hydraPlatforms = lib.platforms.none;
-       maintainers = [ lib.maintainers.Gabriel439 ];
+       maintainers = [ lib.maintainers.Gabriella439 ];
        broken = true;
      }) {};
 
@@ -184142,7 +184142,7 @@ self: {
        testHaskellDepends = [ base doctest ];
        description = "List monad transformer";
        license = lib.licenses.bsd3;
-       maintainers = [ lib.maintainers.Gabriel439 ];
+       maintainers = [ lib.maintainers.Gabriella439 ];
      }) {};
 
   "list-tries" = callPackage
@@ -189401,7 +189401,7 @@ self: {
        libraryHaskellDepends = [ base transformers ];
        description = "A monad for managed values";
        license = lib.licenses.bsd3;
-       maintainers = [ lib.maintainers.Gabriel439 ];
+       maintainers = [ lib.maintainers.Gabriella439 ];
      }) {};
 
   "managed-functions" = callPackage
@@ -196033,7 +196033,7 @@ self: {
        description = "Monad morphisms";
        license = lib.licenses.bsd3;
        hydraPlatforms = lib.platforms.none;
-       maintainers = [ lib.maintainers.Gabriel439 ];
+       maintainers = [ lib.maintainers.Gabriella439 ];
      }) {};
 
   "mmorph" = callPackage
@@ -196049,7 +196049,7 @@ self: {
        ];
        description = "Monad morphisms";
        license = lib.licenses.bsd3;
-       maintainers = [ lib.maintainers.Gabriel439 ];
+       maintainers = [ lib.maintainers.Gabriella439 ];
      }) {};
 
   "mmsyn2" = callPackage
@@ -200059,7 +200059,7 @@ self: {
        license = lib.licenses.bsd3;
        hydraPlatforms = lib.platforms.none;
        mainProgram = "morte";
-       maintainers = [ lib.maintainers.Gabriel439 ];
+       maintainers = [ lib.maintainers.Gabriella439 ];
        broken = true;
      }) {};
 
@@ -203227,7 +203227,7 @@ self: {
        description = "Model-view-controller";
        license = lib.licenses.bsd3;
        hydraPlatforms = lib.platforms.none;
-       maintainers = [ lib.maintainers.Gabriel439 ];
+       maintainers = [ lib.maintainers.Gabriella439 ];
        broken = true;
      }) {};
 
@@ -203243,7 +203243,7 @@ self: {
        description = "Concurrent and combinable updates";
        license = lib.licenses.bsd3;
        hydraPlatforms = lib.platforms.none;
-       maintainers = [ lib.maintainers.Gabriel439 ];
+       maintainers = [ lib.maintainers.Gabriella439 ];
      }) {};
 
   "mvclient" = callPackage
@@ -208266,7 +208266,7 @@ self: {
        description = "Parse and render *.drv files";
        license = lib.licenses.bsd3;
        mainProgram = "pretty-derivation";
-       maintainers = [ lib.maintainers.Gabriel439 lib.maintainers.sorki ];
+       maintainers = [ lib.maintainers.Gabriella439 lib.maintainers.sorki ];
      }) {};
 
   "nix-diff" = callPackage
@@ -208300,7 +208300,7 @@ self: {
        license = lib.licenses.bsd3;
        mainProgram = "nix-diff";
        maintainers = [
-         lib.maintainers.Gabriel439 lib.maintainers.sorki
+         lib.maintainers.Gabriella439 lib.maintainers.sorki
          lib.maintainers.terlar
        ];
      }) {};
@@ -214726,7 +214726,7 @@ self: {
        libraryHaskellDepends = [ base ];
        description = "Optional function arguments";
        license = lib.licenses.bsd3;
-       maintainers = [ lib.maintainers.Gabriel439 ];
+       maintainers = [ lib.maintainers.Gabriella439 ];
      }) {};
 
   "options" = callPackage
@@ -214871,7 +214871,7 @@ self: {
        executableHaskellDepends = [ base ];
        description = "Auto-generate a command-line parser for your datatype";
        license = lib.licenses.bsd3;
-       maintainers = [ lib.maintainers.Gabriel439 ];
+       maintainers = [ lib.maintainers.Gabriella439 ];
      }) {};
 
   "optparse-generic_1_5_0" = callPackage
@@ -214892,7 +214892,7 @@ self: {
        description = "Auto-generate a command-line parser for your datatype";
        license = lib.licenses.bsd3;
        hydraPlatforms = lib.platforms.none;
-       maintainers = [ lib.maintainers.Gabriel439 ];
+       maintainers = [ lib.maintainers.Gabriella439 ];
      }) {};
 
   "optparse-helper" = callPackage
@@ -225584,7 +225584,7 @@ self: {
        ];
        description = "Compositional pipelines";
        license = lib.licenses.bsd3;
-       maintainers = [ lib.maintainers.Gabriel439 ];
+       maintainers = [ lib.maintainers.Gabriella439 ];
      }) {};
 
   "pipes-aeson" = callPackage
@@ -225774,7 +225774,7 @@ self: {
        ];
        description = "ByteString support for pipes";
        license = lib.licenses.bsd3;
-       maintainers = [ lib.maintainers.Gabriel439 ];
+       maintainers = [ lib.maintainers.Gabriella439 ];
      }) {};
 
   "pipes-bzip" = callPackage
@@ -225944,7 +225944,7 @@ self: {
        testHaskellDepends = [ async base pipes stm ];
        description = "Concurrency for the pipes ecosystem";
        license = lib.licenses.bsd3;
-       maintainers = [ lib.maintainers.Gabriel439 ];
+       maintainers = [ lib.maintainers.Gabriella439 ];
      }) {};
 
   "pipes-conduit" = callPackage
@@ -226007,7 +226007,7 @@ self: {
        ];
        description = "Fast, streaming csv parser";
        license = lib.licenses.mit;
-       maintainers = [ lib.maintainers.Gabriel439 ];
+       maintainers = [ lib.maintainers.Gabriella439 ];
      }) {};
 
   "pipes-errors" = callPackage
@@ -226067,7 +226067,7 @@ self: {
        ];
        description = "Extra utilities for pipes";
        license = lib.licenses.bsd3;
-       maintainers = [ lib.maintainers.Gabriel439 ];
+       maintainers = [ lib.maintainers.Gabriella439 ];
      }) {};
 
   "pipes-fastx" = callPackage
@@ -226152,7 +226152,7 @@ self: {
        testHaskellDepends = [ base doctest lens-family-core ];
        description = "Group streams into substreams";
        license = lib.licenses.bsd3;
-       maintainers = [ lib.maintainers.Gabriel439 ];
+       maintainers = [ lib.maintainers.Gabriella439 ];
      }) {};
 
   "pipes-http" = callPackage
@@ -226170,7 +226170,7 @@ self: {
        ];
        description = "HTTP client with pipes interface";
        license = lib.licenses.bsd3;
-       maintainers = [ lib.maintainers.Gabriel439 ];
+       maintainers = [ lib.maintainers.Gabriella439 ];
      }) {};
 
   "pipes-illumina" = callPackage
@@ -226441,7 +226441,7 @@ self: {
        libraryHaskellDepends = [ base pipes transformers ];
        description = "Parsing infrastructure for the pipes ecosystem";
        license = lib.licenses.bsd3;
-       maintainers = [ lib.maintainers.Gabriel439 ];
+       maintainers = [ lib.maintainers.Gabriella439 ];
      }) {};
 
   "pipes-postgresql-simple" = callPackage
@@ -226568,7 +226568,7 @@ self: {
        ];
        description = "Safety for the pipes ecosystem";
        license = lib.licenses.bsd3;
-       maintainers = [ lib.maintainers.Gabriel439 ];
+       maintainers = [ lib.maintainers.Gabriella439 ];
      }) {};
 
   "pipes-shell" = callPackage
@@ -262691,7 +262691,7 @@ self: {
        description = "Auto-generate a server for your datatype";
        license = lib.licenses.bsd3;
        hydraPlatforms = lib.platforms.none;
-       maintainers = [ lib.maintainers.Gabriel439 ];
+       maintainers = [ lib.maintainers.Gabriella439 ];
        broken = true;
      }) {};
 
@@ -296362,7 +296362,7 @@ self: {
        libraryHaskellDepends = [ base void ];
        description = "Exhaustive pattern matching using lenses, traversals, and prisms";
        license = lib.licenses.bsd3;
-       maintainers = [ lib.maintainers.Gabriel439 ];
+       maintainers = [ lib.maintainers.Gabriella439 ];
      }) {};
 
   "total-alternative" = callPackage
@@ -299462,7 +299462,7 @@ self: {
        benchmarkHaskellDepends = [ base tasty-bench text ];
        description = "Shell programming, Haskell-style";
        license = lib.licenses.bsd3;
-       maintainers = [ lib.maintainers.Gabriel439 ];
+       maintainers = [ lib.maintainers.Gabriella439 ];
      }) {};
 
   "turtle_1_6_1" = callPackage
@@ -299491,7 +299491,7 @@ self: {
        description = "Shell programming, Haskell-style";
        license = lib.licenses.bsd3;
        hydraPlatforms = lib.platforms.none;
-       maintainers = [ lib.maintainers.Gabriel439 ];
+       maintainers = [ lib.maintainers.Gabriella439 ];
      }) {};
 
   "turtle-options" = callPackage
@@ -301329,7 +301329,7 @@ self: {
        executableHaskellDepends = [ base diagrams-lib text ];
        description = "Typed and composable spreadsheets";
        license = lib.licenses.bsd3;
-       maintainers = [ lib.maintainers.Gabriel439 ];
+       maintainers = [ lib.maintainers.Gabriella439 ];
      }) {};
 
   "typed-streams" = callPackage
diff --git a/pkgs/test/haskell/default.nix b/pkgs/test/haskell/default.nix
index 337d2811c6550..86764380ecc30 100644
--- a/pkgs/test/haskell/default.nix
+++ b/pkgs/test/haskell/default.nix
@@ -6,4 +6,5 @@ lib.recurseIntoAttrs {
   documentationTarball = callPackage ./documentationTarball { };
   setBuildTarget = callPackage ./setBuildTarget { };
   writers = callPackage ./writers { };
+  incremental = callPackage ./incremental { };
 }
diff --git a/pkgs/test/haskell/incremental/default.nix b/pkgs/test/haskell/incremental/default.nix
new file mode 100644
index 0000000000000..b94a85277db3f
--- /dev/null
+++ b/pkgs/test/haskell/incremental/default.nix
@@ -0,0 +1,35 @@
+# Demonstration of incremental builds for Haskell. Useful for speeding up CI.
+#
+# See: https://www.haskellforall.com/2022/12/nixpkgs-support-for-incremental-haskell.html
+# See: https://felixspringer.xyz/homepage/blog/incrementalHaskellBuildsWithNix
+
+{ haskell, lib }:
+
+let
+  inherit (haskell.lib.compose) overrideCabal;
+
+  # Incremental builds work with GHC >=9.4.
+  turtle = haskell.packages.ghc944.turtle;
+
+  # This will do a full build of `turtle`, while writing the intermediate build products
+  # (compiled modules, etc.) to the `intermediates` output.
+  turtle-full-build-with-incremental-output = overrideCabal (drv: {
+    doInstallIntermediates = true;
+    enableSeparateIntermediatesOutput = true;
+  }) turtle;
+
+  # This will do an incremental build of `turtle` by copying the previously
+  # compiled modules and intermediate build products into the source tree
+  # before running the build.
+  #
+  # GHC will then naturally pick up and reuse these products, making this build
+  # complete much more quickly than the previous one.
+  turtle-incremental-build = overrideCabal (drv: {
+    previousIntermediates = turtle-full-build-with-incremental-output.intermediates;
+  }) turtle;
+in
+  turtle-incremental-build.overrideAttrs (old: {
+    meta = {
+      maintainers = lib.teams.mercury.members;
+    };
+  })