diff --git a/pkgs/development/compilers/elm/default.nix b/pkgs/development/compilers/elm/default.nix
index dacaf27ca9d0..6bfc64302fa4 100644
--- a/pkgs/development/compilers/elm/default.nix
+++ b/pkgs/development/compilers/elm/default.nix
@@ -10,10 +10,7 @@ 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 {
+  hs98Pkgs = import ./packages/ghc9_8 {
     inherit
       pkgs
       lib
@@ -23,7 +20,7 @@ let
       ;
   };
 
-  assembleScope = self: basics: (hs98Pkgs self).elmPkgs // (hs96Pkgs self).elmPkgs // basics;
+  assembleScope = self: basics: (hs98Pkgs self).elmPkgs // basics;
 in
 lib.makeScope pkgs.newScope (
   self:
diff --git a/pkgs/development/compilers/elm/packages/elm-test/default.nix b/pkgs/development/compilers/elm/packages/elm-test/default.nix
index e918b5ec0e41..744dfe792984 100644
--- a/pkgs/development/compilers/elm/packages/elm-test/default.nix
+++ b/pkgs/development/compilers/elm/packages/elm-test/default.nix
@@ -6,16 +6,16 @@
 
 buildNpmPackage rec {
   pname = "elm-test";
-  version = "0.19.1-revision17";
+  version = "0.19.2-0";
 
   src = fetchFromGitHub {
     owner = "rtfeldman";
     repo = "node-test-runner";
     rev = version;
-    hash = "sha256-qmzmImTDH7CBFxEDtR+XydegnpuYiZuNF6eJ80I2fwM=";
+    hash = "sha256-Kta6O4EYeqqEmkRXs0yLzTL47RY8DiyAwszhjWi3xwU=";
   };
 
-  npmDepsHash = "sha256-Yy53mGzARXRnPDLWnUevbnSCMSch1ecsvROu5C96WBA=";
+  npmDepsHash = "sha256-J1o5dsjyiDav5KELjFGibYETmJO6j8CmLzP7pg/tncM=";
 
   postPatch = ''
     sed -i '/elm-tooling install/d' package.json
diff --git a/pkgs/development/compilers/elm/packages/ghc9_6/default.nix b/pkgs/development/compilers/elm/packages/ghc9_6/default.nix
deleted file mode 100644
index 14e6af7a25fb..000000000000
--- a/pkgs/development/compilers/elm/packages/ghc9_6/default.nix
+++ /dev/null
@@ -1,50 +0,0 @@
-{
-  pkgs,
-  lib,
-  makeWrapper,
-  nodejs,
-  fetchElmDeps,
-}:
-
-self:
-pkgs.haskell.packages.ghc96.override {
-  overrides =
-    self: super:
-    let
-      inherit (pkgs.haskell.lib.compose) overrideCabal;
-      elmPkgs = rec {
-        elm = overrideCabal (drv: {
-          # sadly with parallelism most of the time breaks compilation
-          enableParallelBuilding = false;
-          preConfigure = fetchElmDeps {
-            elmPackages = (import ../elm-srcs.nix);
-            elmVersion = drv.version;
-            registryDat = ../../registry.dat;
-          };
-          buildTools = drv.buildTools or [ ] ++ [ makeWrapper ];
-          postInstall = ''
-            wrapProgram $out/bin/elm \
-              --prefix PATH ':' ${lib.makeBinPath [ nodejs ]}
-          '';
-
-          description = "Delightful language for reliable webapps";
-          homepage = "https://elm-lang.org/";
-          license = lib.licenses.bsd3;
-          maintainers = with lib.maintainers; [
-            turbomack
-          ];
-        }) (self.callPackage ./elm { });
-
-        inherit fetchElmDeps;
-        elmVersion = elmPkgs.elm.version;
-      };
-    in
-    elmPkgs
-    // {
-      inherit elmPkgs;
-
-      ansi-wl-pprint = overrideCabal (drv: {
-        jailbreak = true;
-      }) (self.callPackage ./ansi-wl-pprint { });
-    };
-}
diff --git a/pkgs/development/compilers/elm/packages/ghc9_6/ansi-wl-pprint/default.nix b/pkgs/development/compilers/elm/packages/ghc9_8/ansi-wl-pprint/default.nix
similarity index 100%
rename from pkgs/development/compilers/elm/packages/ghc9_6/ansi-wl-pprint/default.nix
rename to pkgs/development/compilers/elm/packages/ghc9_8/ansi-wl-pprint/default.nix
diff --git a/pkgs/development/compilers/elm/packages/ghc9_8/default.nix b/pkgs/development/compilers/elm/packages/ghc9_8/default.nix
index 8e6078f81876..ece17961d804 100644
--- a/pkgs/development/compilers/elm/packages/ghc9_8/default.nix
+++ b/pkgs/development/compilers/elm/packages/ghc9_8/default.nix
@@ -1,4 +1,10 @@
-{ pkgs, lib }:
+{
+  pkgs,
+  lib,
+  makeWrapper,
+  nodejs,
+  fetchElmDeps,
+}:
 
 self:
 pkgs.haskell.packages.ghc98.override {
@@ -8,6 +14,39 @@ pkgs.haskell.packages.ghc98.override {
       inherit (pkgs.haskell.lib.compose) justStaticExecutables overrideCabal;
 
       elmPkgs = {
+        elm =
+          overrideCabal
+            (drv: {
+              # sadly with parallelism most of the time breaks compilation
+              enableParallelBuilding = false;
+              preConfigure = fetchElmDeps {
+                elmPackages = (import ../elm-srcs.nix);
+                elmVersion = drv.version;
+                registryDat = ../../registry.dat;
+              };
+              buildTools = drv.buildTools or [ ] ++ [ makeWrapper ];
+              postInstall = ''
+                wrapProgram $out/bin/elm \
+                  --prefix PATH ':' ${lib.makeBinPath [ nodejs ]}
+              '';
+
+              description = "Delightful language for reliable webapps";
+              homepage = "https://elm-lang.org/";
+              license = lib.licenses.bsd3;
+              maintainers = with lib.maintainers; [
+                turbomack
+              ];
+            })
+            (
+              self.callPackage ./elm {
+                # note: only elm itself works with this older version
+                # elm-format needs the standard newer version
+                ansi-wl-pprint = overrideCabal (drv: {
+                  jailbreak = true;
+                }) (self.callPackage ./ansi-wl-pprint { });
+              }
+            );
+
         # Post-patch override taken from the upstream repository:
         # https://github.com/avh4/elm-format/blob/e7e5da37716acbfb4954a88128b5cc72b2c911d9/package/nix/generate_derivation.sh
         elm-format = justStaticExecutables (
@@ -28,6 +67,9 @@ pkgs.haskell.packages.ghc98.override {
             ];
           }) (self.callPackage ./elm-format/elm-format.nix { })
         );
+
+        inherit fetchElmDeps;
+        elmVersion = elmPkgs.elm.version;
       };
     in
     elmPkgs
diff --git a/pkgs/development/compilers/elm/packages/ghc9_8/elm-format/avh4-lib.nix b/pkgs/development/compilers/elm/packages/ghc9_8/elm-format/avh4-lib.nix
index ac2963015b39..397930f6ebb7 100644
--- a/pkgs/development/compilers/elm/packages/ghc9_8/elm-format/avh4-lib.nix
+++ b/pkgs/development/compilers/elm/packages/ghc9_8/elm-format/avh4-lib.nix
@@ -22,7 +22,7 @@ mkDerivation {
   src = fetchgit {
     url = "https://github.com/avh4/elm-format";
     sha256 = "13i1wgva6p9zsx1a7sfb3skc0rv187isb920chkhljyh48c12k8l";
-    rev = "d07fddc8c0eef412dba07be4ab8768d6abcca796";
+    rev = "4c5bfea5f47b38c1fd7ffa431c51c328a3ae5ba6";
     fetchSubmodules = true;
   };
   postUnpack = "sourceRoot+=/avh4-lib; echo source root reset to $sourceRoot";
@@ -55,5 +55,5 @@ mkDerivation {
   testToolDepends = [ tasty-discover ];
   doHaddock = false;
   description = "Common code for haskell projects";
-  license = lib.licenses.bsd3;
+  license = lib.meta.getLicenseFromSpdxId "BSD-3-Clause";
 }
diff --git a/pkgs/development/compilers/elm/packages/ghc9_8/elm-format/elm-format-lib.nix b/pkgs/development/compilers/elm/packages/ghc9_8/elm-format/elm-format-lib.nix
index 1431976b603a..a87d90799593 100644
--- a/pkgs/development/compilers/elm/packages/ghc9_8/elm-format/elm-format-lib.nix
+++ b/pkgs/development/compilers/elm/packages/ghc9_8/elm-format/elm-format-lib.nix
@@ -28,7 +28,7 @@ mkDerivation {
   src = fetchgit {
     url = "https://github.com/avh4/elm-format";
     sha256 = "13i1wgva6p9zsx1a7sfb3skc0rv187isb920chkhljyh48c12k8l";
-    rev = "d07fddc8c0eef412dba07be4ab8768d6abcca796";
+    rev = "4c5bfea5f47b38c1fd7ffa431c51c328a3ae5ba6";
     fetchSubmodules = true;
   };
   postUnpack = "sourceRoot+=/elm-format-lib; echo source root reset to $sourceRoot";
@@ -69,5 +69,5 @@ mkDerivation {
   testToolDepends = [ tasty-discover ];
   doHaddock = false;
   description = "Common code used by elm-format and elm-refactor";
-  license = lib.licenses.bsd3;
+  license = lib.meta.getLicenseFromSpdxId "BSD-3-Clause";
 }
diff --git a/pkgs/development/compilers/elm/packages/ghc9_8/elm-format/elm-format-markdown.nix b/pkgs/development/compilers/elm/packages/ghc9_8/elm-format/elm-format-markdown.nix
index 639870aa4671..61e15f7e8334 100644
--- a/pkgs/development/compilers/elm/packages/ghc9_8/elm-format/elm-format-markdown.nix
+++ b/pkgs/development/compilers/elm/packages/ghc9_8/elm-format/elm-format-markdown.nix
@@ -13,7 +13,7 @@ mkDerivation {
   src = fetchgit {
     url = "https://github.com/avh4/elm-format";
     sha256 = "13i1wgva6p9zsx1a7sfb3skc0rv187isb920chkhljyh48c12k8l";
-    rev = "d07fddc8c0eef412dba07be4ab8768d6abcca796";
+    rev = "4c5bfea5f47b38c1fd7ffa431c51c328a3ae5ba6";
     fetchSubmodules = true;
   };
   postUnpack = "sourceRoot+=/elm-format-markdown; echo source root reset to $sourceRoot";
@@ -25,5 +25,5 @@ mkDerivation {
   ];
   doHaddock = false;
   description = "Markdown parsing for Elm documentation comments";
-  license = lib.licenses.bsd3;
+  license = lib.meta.getLicenseFromSpdxId "BSD-3-Clause";
 }
diff --git a/pkgs/development/compilers/elm/packages/ghc9_8/elm-format/elm-format-test-lib.nix b/pkgs/development/compilers/elm/packages/ghc9_8/elm-format/elm-format-test-lib.nix
index 48c86d2e3c37..063a25dcc197 100644
--- a/pkgs/development/compilers/elm/packages/ghc9_8/elm-format/elm-format-test-lib.nix
+++ b/pkgs/development/compilers/elm/packages/ghc9_8/elm-format/elm-format-test-lib.nix
@@ -23,7 +23,7 @@ mkDerivation {
   src = fetchgit {
     url = "https://github.com/avh4/elm-format";
     sha256 = "13i1wgva6p9zsx1a7sfb3skc0rv187isb920chkhljyh48c12k8l";
-    rev = "d07fddc8c0eef412dba07be4ab8768d6abcca796";
+    rev = "4c5bfea5f47b38c1fd7ffa431c51c328a3ae5ba6";
     fetchSubmodules = true;
   };
   postUnpack = "sourceRoot+=/elm-format-test-lib; echo source root reset to $sourceRoot";
@@ -58,5 +58,5 @@ mkDerivation {
   testToolDepends = [ tasty-discover ];
   doHaddock = false;
   description = "Test helpers used by elm-format-tests and elm-refactor-tests";
-  license = lib.licenses.bsd3;
+  license = lib.meta.getLicenseFromSpdxId "BSD-3-Clause";
 }
diff --git a/pkgs/development/compilers/elm/packages/ghc9_8/elm-format/elm-format.nix b/pkgs/development/compilers/elm/packages/ghc9_8/elm-format/elm-format.nix
index 1b50f8d8384a..32ea8955fa65 100644
--- a/pkgs/development/compilers/elm/packages/ghc9_8/elm-format/elm-format.nix
+++ b/pkgs/development/compilers/elm/packages/ghc9_8/elm-format/elm-format.nix
@@ -26,7 +26,7 @@ mkDerivation {
   src = fetchgit {
     url = "https://github.com/avh4/elm-format";
     sha256 = "13i1wgva6p9zsx1a7sfb3skc0rv187isb920chkhljyh48c12k8l";
-    rev = "d07fddc8c0eef412dba07be4ab8768d6abcca796";
+    rev = "4c5bfea5f47b38c1fd7ffa431c51c328a3ae5ba6";
     fetchSubmodules = true;
   };
   isLibrary = false;
@@ -64,6 +64,6 @@ mkDerivation {
   doHaddock = false;
   homepage = "https://elm-lang.org";
   description = "A source code formatter for Elm";
-  license = lib.licenses.bsd3;
+  license = lib.meta.getLicenseFromSpdxId "BSD-3-Clause";
   mainProgram = "elm-format";
 }
diff --git a/pkgs/development/compilers/elm/packages/ghc9_8/elm/ansi-terminal-1.1.patch b/pkgs/development/compilers/elm/packages/ghc9_8/elm/ansi-terminal-1.1.patch
new file mode 100644
index 000000000000..c49ef3350909
--- /dev/null
+++ b/pkgs/development/compilers/elm/packages/ghc9_8/elm/ansi-terminal-1.1.patch
@@ -0,0 +1,30 @@
+commit d42c9fb8023dd00b0cd17d1de9bdbf492f2d7551
+Author: Matt McHenry <github@matt.mchenryfamily.org>
+Date:   Tue Jul 7 22:20:19 2026
+
+    stub out support for new underlining modes in ansi-terminal 1.1
+
+diff --git a/compiler/src/Reporting/Doc.hs b/compiler/src/Reporting/Doc.hs
+index ccfb0d19..3ee16900 100644
+--- a/compiler/src/Reporting/Doc.hs
++++ b/compiler/src/Reporting/Doc.hs
+@@ -363,6 +363,9 @@ isUnderline underlining =
+   case underlining of
+     Ansi.SingleUnderline -> True
+     Ansi.DoubleUnderline -> False
++    Ansi.CurlyUnderline -> False
++    Ansi.DottedUnderline -> False
++    Ansi.DashedUnderline -> False
+     Ansi.NoUnderline -> False
+ 
+ 
+@@ -372,6 +375,9 @@ toColor layer intensity color =
+     Ansi.Background ->
+       Nothing
+ 
++    Ansi.Underlining ->
++      Nothing
++
+     Ansi.Foreground ->
+       let
+         pick dull vivid =
diff --git a/pkgs/development/compilers/elm/packages/ghc9_6/elm/default.nix b/pkgs/development/compilers/elm/packages/ghc9_8/elm/default.nix
similarity index 83%
rename from pkgs/development/compilers/elm/packages/ghc9_6/elm/default.nix
rename to pkgs/development/compilers/elm/packages/ghc9_8/elm/default.nix
index 253a9986ac64..5fb29349c02c 100644
--- a/pkgs/development/compilers/elm/packages/ghc9_6/elm/default.nix
+++ b/pkgs/development/compilers/elm/packages/ghc9_8/elm/default.nix
@@ -9,7 +9,6 @@
   directory,
   edit-distance,
   fetchgit,
-  file-embed,
   filelock,
   filepath,
   ghc-prim,
@@ -24,7 +23,6 @@
   network,
   parsec,
   process,
-  raw-strings-qq,
   scientific,
   SHA,
   snap-core,
@@ -38,13 +36,14 @@
 }:
 mkDerivation {
   pname = "elm";
-  version = "0.19.1";
+  version = "0.19.2";
   src = fetchgit {
     url = "https://github.com/elm/compiler";
-    sha256 = "1h9jhwlv1pqqna5s09vd72arwhhjn0dlhv0w9xx5771x0xryxxg8";
-    rev = "2f6dd29258e880dbb7effd57a829a0470d8da48b";
+    sha256 = "0npadfvk5gyiifq4095yg7k8cr3hb28drdh07b77nxzwsqanp4s5";
+    rev = "48befde196cbcbdf459114e36c02b52c49b58050";
     fetchSubmodules = true;
   };
+  patches = [ ./ansi-terminal-1.1.patch ];
   isLibrary = false;
   isExecutable = true;
   executableHaskellDepends = [
@@ -56,7 +55,6 @@ mkDerivation {
     containers
     directory
     edit-distance
-    file-embed
     filelock
     filepath
     ghc-prim
@@ -70,7 +68,6 @@ mkDerivation {
     network
     parsec
     process
-    raw-strings-qq
     scientific
     SHA
     snap-core
@@ -84,6 +81,6 @@ mkDerivation {
   ];
   homepage = "https://elm-lang.org";
   description = "The `elm` command line interface";
-  license = lib.licenses.bsd3;
+  license = lib.meta.getLicenseFromSpdxId "BSD-3-Clause";
   mainProgram = "elm";
 }
diff --git a/pkgs/development/compilers/elm/update.sh b/pkgs/development/compilers/elm/update.sh
index 5e47110d4a2f..661ff47c8068 100755
--- a/pkgs/development/compilers/elm/update.sh
+++ b/pkgs/development/compilers/elm/update.sh
@@ -1,5 +1,9 @@
 #!/usr/bin/env nix-shell
-#!nix-shell -p cabal2nix elm2nix -i bash ../../..
+#!nix-shell -I nixpkgs=../../../..
+#!nix-shell --pure -p nix cacert cabal2nix elm2nix nixfmt -i bash ../../../..
+
+set -o errexit
+set -o nounset
 
 # Update all cabal packages.
 for subpath in 'avh4-lib' 'elm-format-lib' 'elm-format-markdown' 'elm-format-test-lib'; do
@@ -7,13 +11,11 @@ for subpath in 'avh4-lib' 'elm-format-lib' 'elm-format-markdown' 'elm-format-tes
     --subpath $subpath > packages/ghc9_8/elm-format/${subpath}.nix
 done
 cabal2nix --no-haddock 'https://github.com/avh4/elm-format' --revision '0.8.8' > packages/ghc9_8/elm-format/elm-format.nix
-cabal2nix 'https://github.com/ekmett/ansi-wl-pprint' --revision 'v0.6.8.1' > packages/ghc9_6/ansi-wl-pprint/default.nix
+cabal2nix 'https://github.com/ekmett/ansi-wl-pprint' --revision 'v0.6.8.1' > packages/ghc9_8/ansi-wl-pprint/default.nix
 
-# We're building binaries from commit that npm installer is using since
-# November 1st release called 0.19.1-6 in npm registry.
+# We're building binaries from commit corresponding to https://github.com/elm/compiler/releases/tag/0.19.2.
 # These binaries are built with newer ghc version and also support Aarch64 for Linux and Darwin.
-# Upstream git tag for 0.19.1 is still pointing to original commit from 2019.
-cabal2nix https://github.com/elm/compiler --revision 2f6dd29258e880dbb7effd57a829a0470d8da48b > packages/ghc9_6/elm/default.nix
+cabal2nix https://github.com/elm/compiler --revision 48befde196cbcbdf459114e36c02b52c49b58050 > packages/ghc9_8/elm/default.nix
 
 echo "need to manually copy registry.dat from an existing elm project"
 #elm2nix snapshot > registry.dat
@@ -21,3 +23,6 @@ echo "need to manually copy registry.dat from an existing elm project"
 pushd "$(nix-build -A elmPackages.elm.src --no-out-link ../../../..)/reactor"
   elm2nix convert > $OLDPWD/packages/elm-srcs.nix
 popd
+
+# cabal2nix, elm2nix, etc. may not respect nixpkgs formatting rules
+nixfmt .