diff --git a/pkgs/development/compilers/elm/default.nix b/pkgs/development/compilers/elm/default.nix
index c1b530471c3b..6fc37cc58db8 100644
--- a/pkgs/development/compilers/elm/default.nix
+++ b/pkgs/development/compilers/elm/default.nix
@@ -8,6 +8,9 @@
 let
   fetchElmDeps = pkgs.callPackage ./lib/fetchElmDeps.nix { };
 
+  # Haskell packages that require ghc 9.8
+  hs98Pkgs = import ./packages/ghc9_8 { inherit pkgs lib; };
+
   # Haskell packages that require ghc 9.6
   hs96Pkgs = import ./packages/ghc9_6 {
     inherit
@@ -19,9 +22,6 @@ let
       ;
   };
 
-  # Haskell packages that require ghc 9.4
-  hs94Pkgs = import ./packages/ghc9_4 { inherit pkgs lib; };
-
   # Patched, originally npm-downloaded, packages
   patchedNodePkgs = import ./packages/node {
     inherit
@@ -34,7 +34,7 @@ let
 
   assembleScope =
     self: basics:
-    (hs96Pkgs self).elmPkgs // (hs94Pkgs self).elmPkgs // (patchedNodePkgs self) // basics;
+    (hs98Pkgs self).elmPkgs // (hs96Pkgs self).elmPkgs // (patchedNodePkgs self) // basics;
 in
 lib.makeScope pkgs.newScope (
   self:
diff --git a/pkgs/development/compilers/elm/packages/ghc9_4/default.nix b/pkgs/development/compilers/elm/packages/ghc9_4/default.nix
deleted file mode 100644
index 2f44db00458e..000000000000
--- a/pkgs/development/compilers/elm/packages/ghc9_4/default.nix
+++ /dev/null
@@ -1,53 +0,0 @@
-{ pkgs, lib }:
-
-self:
-pkgs.haskell.packages.ghc94.override {
-  overrides =
-    self: super:
-    let
-      inherit (pkgs.haskell.lib.compose) justStaticExecutables overrideCabal doJailbreak;
-      elmPkgs = {
-        /*
-          The elm-format expression is updated via a script in the https://github.com/avh4/elm-format repo:
-          `package/nix/build.sh`
-        */
-        elm-format = justStaticExecutables (
-          overrideCabal (drv: {
-            jailbreak = true;
-            doHaddock = false;
-            postPatch = ''
-              mkdir -p ./generated
-              cat <<EOHS > ./generated/Build_elm_format.hs
-              module Build_elm_format where
-              gitDescribe :: String
-              gitDescribe = "${drv.version}"
-              EOHS
-            '';
-
-            description = "Formats Elm source code according to a standard set of rules based on the official Elm Style Guide";
-            homepage = "https://github.com/avh4/elm-format";
-            license = lib.licenses.bsd3;
-            maintainers = with lib.maintainers; [
-              avh4
-              turbomack
-            ];
-          }) (self.callPackage ./elm-format/elm-format.nix { })
-        );
-      };
-
-      fixHaddock = overrideCabal (_: {
-        configureFlags = [ "--ghc-option=-Wno-error=unused-packages" ];
-        doHaddock = false;
-      });
-    in
-    elmPkgs
-    // {
-      inherit elmPkgs;
-
-      # Needed for elm-format
-      avh4-lib = fixHaddock (doJailbreak (self.callPackage ./elm-format/avh4-lib.nix { }));
-      elm-format-lib = fixHaddock (doJailbreak (self.callPackage ./elm-format/elm-format-lib.nix { }));
-      elm-format-test-lib = fixHaddock (self.callPackage ./elm-format/elm-format-test-lib.nix { });
-      elm-format-markdown = fixHaddock (self.callPackage ./elm-format/elm-format-markdown.nix { });
-    };
-}
diff --git a/pkgs/development/compilers/elm/packages/ghc9_8/default.nix b/pkgs/development/compilers/elm/packages/ghc9_8/default.nix
new file mode 100644
index 000000000000..0e8cf8749d96
--- /dev/null
+++ b/pkgs/development/compilers/elm/packages/ghc9_8/default.nix
@@ -0,0 +1,36 @@
+{ pkgs, lib }:
+
+self:
+pkgs.haskell.packages.ghc98.override {
+  overrides =
+    self: super:
+    let
+      inherit (pkgs.haskell.lib.compose) justStaticExecutables overrideCabal;
+
+      elmPkgs = {
+        /*
+          The elm-format expression is updated via a script in the https://github.com/avh4/elm-format repo:
+          `package/nix/build.sh`
+        */
+        elm-format = justStaticExecutables (
+          overrideCabal (drv: {
+            homepage = "https://github.com/avh4/elm-format";
+            maintainers = with lib.maintainers; [
+              avh4
+              turbomack
+            ];
+          }) (self.callPackage ./elm-format/elm-format.nix { })
+        );
+      };
+    in
+    elmPkgs
+    // {
+      inherit elmPkgs;
+
+      # Needed for elm-format
+      avh4-lib = self.callPackage ./elm-format/avh4-lib.nix { };
+      elm-format-lib = self.callPackage ./elm-format/elm-format-lib.nix { };
+      elm-format-test-lib = self.callPackage ./elm-format/elm-format-test-lib.nix { };
+      elm-format-markdown = self.callPackage ./elm-format/elm-format-markdown.nix { };
+    };
+}
diff --git a/pkgs/development/compilers/elm/packages/ghc9_4/elm-format/avh4-lib.nix b/pkgs/development/compilers/elm/packages/ghc9_8/elm-format/avh4-lib.nix
similarity index 84%
rename from pkgs/development/compilers/elm/packages/ghc9_4/elm-format/avh4-lib.nix
rename to pkgs/development/compilers/elm/packages/ghc9_8/elm-format/avh4-lib.nix
index 472afd58b6e8..ac2963015b39 100644
--- a/pkgs/development/compilers/elm/packages/ghc9_4/elm-format/avh4-lib.nix
+++ b/pkgs/development/compilers/elm/packages/ghc9_8/elm-format/avh4-lib.nix
@@ -13,7 +13,6 @@
   relude,
   tasty,
   tasty-discover,
-  tasty-hspec,
   tasty-hunit,
   text,
 }:
@@ -22,8 +21,8 @@ mkDerivation {
   version = "0.0.0.1";
   src = fetchgit {
     url = "https://github.com/avh4/elm-format";
-    sha256 = "04l1bn4w8q3ifd6mc4mfrqxfbihmqnpfjdn6gr0x2jqcasjbk0bi";
-    rev = "b5cca4c26b473dab06e5d73b98148637e4770d45";
+    sha256 = "13i1wgva6p9zsx1a7sfb3skc0rv187isb920chkhljyh48c12k8l";
+    rev = "d07fddc8c0eef412dba07be4ab8768d6abcca796";
     fetchSubmodules = true;
   };
   postUnpack = "sourceRoot+=/avh4-lib; echo source root reset to $sourceRoot";
@@ -50,11 +49,11 @@ mkDerivation {
     process
     relude
     tasty
-    tasty-hspec
     tasty-hunit
     text
   ];
   testToolDepends = [ tasty-discover ];
+  doHaddock = false;
   description = "Common code for haskell projects";
   license = lib.licenses.bsd3;
 }
diff --git a/pkgs/development/compilers/elm/packages/ghc9_4/elm-format/elm-format-lib.nix b/pkgs/development/compilers/elm/packages/ghc9_8/elm-format/elm-format-lib.nix
similarity index 88%
rename from pkgs/development/compilers/elm/packages/ghc9_4/elm-format/elm-format-lib.nix
rename to pkgs/development/compilers/elm/packages/ghc9_8/elm-format/elm-format-lib.nix
index 823c2c3f2729..1431976b603a 100644
--- a/pkgs/development/compilers/elm/packages/ghc9_4/elm-format/elm-format-lib.nix
+++ b/pkgs/development/compilers/elm/packages/ghc9_8/elm-format/elm-format-lib.nix
@@ -27,8 +27,8 @@ mkDerivation {
   version = "0.0.0.1";
   src = fetchgit {
     url = "https://github.com/avh4/elm-format";
-    sha256 = "04l1bn4w8q3ifd6mc4mfrqxfbihmqnpfjdn6gr0x2jqcasjbk0bi";
-    rev = "b5cca4c26b473dab06e5d73b98148637e4770d45";
+    sha256 = "13i1wgva6p9zsx1a7sfb3skc0rv187isb920chkhljyh48c12k8l";
+    rev = "d07fddc8c0eef412dba07be4ab8768d6abcca796";
     fetchSubmodules = true;
   };
   postUnpack = "sourceRoot+=/elm-format-lib; echo source root reset to $sourceRoot";
@@ -67,6 +67,7 @@ mkDerivation {
     text
   ];
   testToolDepends = [ tasty-discover ];
+  doHaddock = false;
   description = "Common code used by elm-format and elm-refactor";
   license = lib.licenses.bsd3;
 }
diff --git a/pkgs/development/compilers/elm/packages/ghc9_4/elm-format/elm-format-markdown.nix b/pkgs/development/compilers/elm/packages/ghc9_8/elm-format/elm-format-markdown.nix
similarity index 78%
rename from pkgs/development/compilers/elm/packages/ghc9_4/elm-format/elm-format-markdown.nix
rename to pkgs/development/compilers/elm/packages/ghc9_8/elm-format/elm-format-markdown.nix
index 4d3420da3f6c..639870aa4671 100644
--- a/pkgs/development/compilers/elm/packages/ghc9_4/elm-format/elm-format-markdown.nix
+++ b/pkgs/development/compilers/elm/packages/ghc9_8/elm-format/elm-format-markdown.nix
@@ -12,8 +12,8 @@ mkDerivation {
   version = "0.0.0.1";
   src = fetchgit {
     url = "https://github.com/avh4/elm-format";
-    sha256 = "04l1bn4w8q3ifd6mc4mfrqxfbihmqnpfjdn6gr0x2jqcasjbk0bi";
-    rev = "b5cca4c26b473dab06e5d73b98148637e4770d45";
+    sha256 = "13i1wgva6p9zsx1a7sfb3skc0rv187isb920chkhljyh48c12k8l";
+    rev = "d07fddc8c0eef412dba07be4ab8768d6abcca796";
     fetchSubmodules = true;
   };
   postUnpack = "sourceRoot+=/elm-format-markdown; echo source root reset to $sourceRoot";
@@ -23,6 +23,7 @@ mkDerivation {
     mtl
     text
   ];
+  doHaddock = false;
   description = "Markdown parsing for Elm documentation comments";
   license = lib.licenses.bsd3;
 }
diff --git a/pkgs/development/compilers/elm/packages/ghc9_4/elm-format/elm-format-test-lib.nix b/pkgs/development/compilers/elm/packages/ghc9_8/elm-format/elm-format-test-lib.nix
similarity index 87%
rename from pkgs/development/compilers/elm/packages/ghc9_4/elm-format/elm-format-test-lib.nix
rename to pkgs/development/compilers/elm/packages/ghc9_8/elm-format/elm-format-test-lib.nix
index c9ddc2b25293..48c86d2e3c37 100644
--- a/pkgs/development/compilers/elm/packages/ghc9_4/elm-format/elm-format-test-lib.nix
+++ b/pkgs/development/compilers/elm/packages/ghc9_8/elm-format/elm-format-test-lib.nix
@@ -22,8 +22,8 @@ mkDerivation {
   version = "0.0.0.1";
   src = fetchgit {
     url = "https://github.com/avh4/elm-format";
-    sha256 = "04l1bn4w8q3ifd6mc4mfrqxfbihmqnpfjdn6gr0x2jqcasjbk0bi";
-    rev = "b5cca4c26b473dab06e5d73b98148637e4770d45";
+    sha256 = "13i1wgva6p9zsx1a7sfb3skc0rv187isb920chkhljyh48c12k8l";
+    rev = "d07fddc8c0eef412dba07be4ab8768d6abcca796";
     fetchSubmodules = true;
   };
   postUnpack = "sourceRoot+=/elm-format-test-lib; echo source root reset to $sourceRoot";
@@ -56,6 +56,7 @@ mkDerivation {
     text
   ];
   testToolDepends = [ tasty-discover ];
+  doHaddock = false;
   description = "Test helpers used by elm-format-tests and elm-refactor-tests";
   license = lib.licenses.bsd3;
 }
diff --git a/pkgs/development/compilers/elm/packages/ghc9_4/elm-format/elm-format.nix b/pkgs/development/compilers/elm/packages/ghc9_8/elm-format/elm-format.nix
similarity index 69%
rename from pkgs/development/compilers/elm/packages/ghc9_4/elm-format/elm-format.nix
rename to pkgs/development/compilers/elm/packages/ghc9_8/elm-format/elm-format.nix
index 7a8cf08f644d..b7a805abb57b 100644
--- a/pkgs/development/compilers/elm/packages/ghc9_4/elm-format/elm-format.nix
+++ b/pkgs/development/compilers/elm/packages/ghc9_8/elm-format/elm-format.nix
@@ -20,13 +20,13 @@
   tasty-quickcheck,
   text,
 }:
-mkDerivation {
+mkDerivation rec {
   pname = "elm-format";
-  version = "0.8.7";
+  version = "0.8.8";
   src = fetchgit {
     url = "https://github.com/avh4/elm-format";
-    sha256 = "04l1bn4w8q3ifd6mc4mfrqxfbihmqnpfjdn6gr0x2jqcasjbk0bi";
-    rev = "b5cca4c26b473dab06e5d73b98148637e4770d45";
+    sha256 = "0klhnfvy1l6mck46qwk6pp4d66cvj0m5w91ylghdcr4fb6ka1gp0";
+    rev = "b06902f1e450f8be1e7b318caab7ccb1950893fa";
     fetchSubmodules = true;
   };
   isLibrary = false;
@@ -61,8 +61,18 @@ mkDerivation {
     tasty-quickcheck
     text
   ];
+  doHaddock = false;
   homepage = "https://elm-lang.org";
-  description = "Source code formatter for Elm";
+  description = "A source code formatter for Elm";
   license = lib.licenses.bsd3;
   mainProgram = "elm-format";
+  postPatch = ''
+    mkdir -p ./generated
+    cat <<EOHS > ./generated/Build_elm_format.hs
+    module Build_elm_format where
+
+    gitDescribe :: String
+    gitDescribe = "${version}"
+    EOHS
+  '';
 }