diff --git a/doc/release-notes/rl-2611.section.md b/doc/release-notes/rl-2611.section.md
index 0963eff015e8..adbd6c83208a 100644
--- a/doc/release-notes/rl-2611.section.md
+++ b/doc/release-notes/rl-2611.section.md
@@ -317,6 +317,10 @@
 
 - `extra-container` v0.17 now enforces assertions and warnings, and is hosted at [new org/repo extra-container/extra-container](https://github.com/extra-container/extra-container). Full changes: [CHANGELOG](https://github.com/extra-container/extra-container/blob/main/CHANGELOG.md)
 
+- `factor-lang` has been updated to 0.102 introducing GTK4 and PCRE2 support.
+  Support of i686-linux (using GTK3) has also been added.
+  Subsequently `factor-lang-0_99` to `factor-lang-0_101` have been marked for removal in the next release, as they receive no updates from upstream.
+
 - `buildPythonPackage` and `buildPythonApplication` now uses `meta.problems.unsupportedPython` to mark Python packages with unsupported Python interpreters.
   - The `disabled` argument automatically converts to `meta.problems.unsupportedPython` with the default message.
   - Overriding the `disabled` argument or the `passthru.disabled` attribute is deprecated.
@@ -409,6 +413,10 @@
 - `macaulay2` no longer installs Emacs files.
   Users can now get the files from an Emacs lisp package, like `emacs.pkgs.withPackages (epkgs: [ epkgs.m2 ])`.
 
+- `factor-lang-*` packages silently switched from PCRE to PCRE2.
+  Thus, factor applications using extra/pcre must switch to extra/pcre2 or have to add the old pcre library back via the `extraLibs` attribute.
+  Upgrade to version 0.102 for full PCRE2 support via extra/pcre2 which is on par with extra/pcre from that release onwards.
+
 - `navidrome`'s plugin infrastructure has significantly changed. `buildNavidromePlugin` is renamed to `buildNavidromeGoPlugin` to allow for other language types. Plugins must now be sourced from `pkgsCross.wasi32.navidromePlugins.<name>`.
 
 - `navidromePlugins.apple-music` now uses a `bundleName` attribute which sets the plugin's name to match the plugin's documentation for easier use. You will need to update your Agent from `apple-music-plugin` to `apple-music` as noted in [their docs](https://github.com/navidrome/apple-music-plugin#installation).
diff --git a/pkgs/development/compilers/factor-lang/0.100.nix b/pkgs/development/compilers/factor-lang/0.100.nix
index ba99d9958df1..a31703d57e1b 100644
--- a/pkgs/development/compilers/factor-lang/0.100.nix
+++ b/pkgs/development/compilers/factor-lang/0.100.nix
@@ -1,6 +1,6 @@
 { callPackage, fetchurl, ... }@args:
 
-callPackage ./unwrapped.nix (
+(callPackage ./unwrapped.nix (
   rec {
     version = "0.100";
     src = fetchurl {
@@ -12,4 +12,9 @@ callPackage ./unwrapped.nix (
     "callPackage"
     "fetchurl"
   ])
-)
+)).overrideAttrs
+  (oA: {
+    meta = (oA.meta or { }) // {
+      problems.removal.message = "Package to be removed in release following 26.11";
+    };
+  })
diff --git a/pkgs/development/compilers/factor-lang/0.101.nix b/pkgs/development/compilers/factor-lang/0.101.nix
index 6785080abb78..1f877d998077 100644
--- a/pkgs/development/compilers/factor-lang/0.101.nix
+++ b/pkgs/development/compilers/factor-lang/0.101.nix
@@ -1,6 +1,6 @@
 { callPackage, fetchurl, ... }@args:
 
-callPackage ./unwrapped.nix (
+(callPackage ./unwrapped.nix (
   rec {
     version = "0.101";
     src = fetchurl {
@@ -12,4 +12,9 @@ callPackage ./unwrapped.nix (
     "callPackage"
     "fetchurl"
   ])
-)
+)).overrideAttrs
+  (oA: {
+    meta = (oA.meta or { }) // {
+      problems.removal.message = "Package to be removed in release following 26.11";
+    };
+  })
diff --git a/pkgs/development/compilers/factor-lang/0.102.nix b/pkgs/development/compilers/factor-lang/0.102.nix
new file mode 100644
index 000000000000..cd64c42b62ef
--- /dev/null
+++ b/pkgs/development/compilers/factor-lang/0.102.nix
@@ -0,0 +1,15 @@
+{ callPackage, fetchurl, ... }@args:
+
+callPackage ./unwrapped.nix (
+  rec {
+    version = "0.102";
+    src = fetchurl {
+      url = "https://downloads.factorcode.org/releases/${version}/factor-src-${version}.zip";
+      hash = "sha256-bQDrq9sYWkCiUlELze0zGgW56DMMXckKGBpjVaMuOrU=";
+    };
+  }
+  // (builtins.removeAttrs args [
+    "callPackage"
+    "fetchurl"
+  ])
+)
diff --git a/pkgs/development/compilers/factor-lang/0.99.nix b/pkgs/development/compilers/factor-lang/0.99.nix
index 16e849f2a87e..2477b9103c93 100644
--- a/pkgs/development/compilers/factor-lang/0.99.nix
+++ b/pkgs/development/compilers/factor-lang/0.99.nix
@@ -1,6 +1,6 @@
 { callPackage, fetchurl, ... }@args:
 
-callPackage ./unwrapped.nix (
+(callPackage ./unwrapped.nix (
   rec {
     version = "0.99";
     src = fetchurl {
@@ -12,4 +12,9 @@ callPackage ./unwrapped.nix (
     "callPackage"
     "fetchurl"
   ])
-)
+)).overrideAttrs
+  (oA: {
+    meta = (oA.meta or { }) // {
+      problems.removal.message = "Package to be removed in release following 26.11";
+    };
+  })
diff --git a/pkgs/development/compilers/factor-lang/adjust-paths-in-unit-tests-0.102.patch b/pkgs/development/compilers/factor-lang/adjust-paths-in-unit-tests-0.102.patch
new file mode 100644
index 000000000000..b2370ce2ee84
--- /dev/null
+++ b/pkgs/development/compilers/factor-lang/adjust-paths-in-unit-tests-0.102.patch
@@ -0,0 +1,24 @@
+diff '--color=auto' -ru factor.orig/basis/io/standard-paths/unix/unix-tests.factor factor/basis/io/standard-paths/unix/unix-tests.factor
+--- factor.orig/basis/io/standard-paths/unix/unix-tests.factor	2026-10-14 13:50:47.445394923 +0200
++++ factor/basis/io/standard-paths/unix/unix-tests.factor	2026-10-14 13:52:28.077933912 +0200
+@@ -56,17 +56,17 @@
+ 
+ { f } [ "" find-in-path ] unit-test
+ { t } [
+-    "ls" find-in-path { "/bin/ls" "/usr/bin/ls" } member?
++    "ls" find-in-path not not
+ ] unit-test
+ 
+ { t } [
+     "/sbin:" "PATH" os-env append "PATH" [
+         "ps" find-in-path
+-        { "/bin/ps" "/sbin/ps" "/usr/bin/ps" } member?
++        not not
+     ] with-os-env
+ ] unit-test
+ 
+ { t } [
+     "ls" find-in-standard-login-path 
+-    { "/bin/ls" "/usr/bin/ls" } member?
++    not not
+ ] unit-test
diff --git a/pkgs/development/compilers/factor-lang/ld.so.cache-from-env-0.102.patch b/pkgs/development/compilers/factor-lang/ld.so.cache-from-env-0.102.patch
new file mode 100644
index 000000000000..24490025f2a3
--- /dev/null
+++ b/pkgs/development/compilers/factor-lang/ld.so.cache-from-env-0.102.patch
@@ -0,0 +1,28 @@
+diff '--color=auto' -ru factor.orig/basis/alien/libraries/finder/linux/linux.factor factor/basis/alien/libraries/finder/linux/linux.factor
+--- factor.orig/basis/alien/libraries/finder/linux/linux.factor	2026-10-14 13:50:47.453225475 +0200
++++ factor/basis/alien/libraries/finder/linux/linux.factor	2026-10-14 14:03:13.204120995 +0200
+@@ -33,16 +33,14 @@
+     ] map ;
+ 
+ : load-ldconfig-cache ( -- seq )
+-    "ldconfig" find-in-path [
+-        { "/usr/sbin/ldconfig" "/sbin/ldconfig" }
+-        [ dup file-exists? [ file-executable? ] [ drop f ] if ] find nip
+-    ] unless*
+-    [
+-        "-p" 2array <process> swap >>command +closed+ >>stderr
+-        utf8 [ read-lines ] with-process-reader* nip 0 = [
+-            [ "=>" swap subseq? ] filter parse-ldconfig-lines
+-        ] [ drop { } ] if
+-    ] [ { } ] if* ;
++    "FACTOR_LD_SO_CACHE" os-env [
++        utf8 [ read-lines ] with-file-reader
++    ] [
++        { } clone
++    ] if*
++    [ { } ] [
++        [ "=>" swap subseq? ] filter parse-ldconfig-lines
++    ] if-empty ;
+ 
+ ! Inspect, do not dlopen, discovery candidates: loading would execute their
+ ! constructors. Also reject linker scripts and foreign-architecture DSOs.
diff --git a/pkgs/development/compilers/factor-lang/mk-factor-application.nix b/pkgs/development/compilers/factor-lang/mk-factor-application.nix
index bbd039ba3615..5619078634a0 100644
--- a/pkgs/development/compilers/factor-lang/mk-factor-application.nix
+++ b/pkgs/development/compilers/factor-lang/mk-factor-application.nix
@@ -127,6 +127,7 @@ in
       '';
 
     __structuredAttrs = true;
+    strictDeps = true;
 
     installPhase =
       attrs.installPhase or /* bash */ ''
diff --git a/pkgs/development/compilers/factor-lang/mk-vocab.nix b/pkgs/development/compilers/factor-lang/mk-vocab.nix
index 3d929498fbac..04d949d15c3d 100644
--- a/pkgs/development/compilers/factor-lang/mk-vocab.nix
+++ b/pkgs/development/compilers/factor-lang/mk-vocab.nix
@@ -20,6 +20,10 @@ drvArgs:
   }@attrs:
   {
     inherit vocabName vocabRoot;
+
+    __structuredAttrs = true;
+    strictDeps = true;
+
     installPhase =
       # Default installer
       # 1. If lib/factor/<vocabRoot>/<vocabName> exists, copy all vocab roots
diff --git a/pkgs/development/compilers/factor-lang/unwrapped.nix b/pkgs/development/compilers/factor-lang/unwrapped.nix
index dddd53148977..7a5e72a320c6 100644
--- a/pkgs/development/compilers/factor-lang/unwrapped.nix
+++ b/pkgs/development/compilers/factor-lang/unwrapped.nix
@@ -21,17 +21,31 @@ stdenv.mkDerivation (finalAttrs: {
   pname = "factor-lang";
 
   inherit src version;
+  __structuredAttrs = true;
+  strictDeps = true;
 
   patches = [
     # Use full path to image while bootstrapping
     ./staging-command-line-0.99-pre.patch
     # Point work vocabulary root to a writable location
     ./workdir-0.99-pre.patch
-    # Patch hard-coded FHS paths
-    ./adjust-paths-in-unit-tests.patch
-    # Avoid using /sbin/ldconfig
-    ./ld.so.cache-from-env.patch
-  ];
+  ]
+  ++ (
+    if (versionOlder finalAttrs.version "0.102") then
+      [
+        # Patch hard-coded FHS paths
+        ./adjust-paths-in-unit-tests.patch
+        # Avoid using /sbin/ldconfig
+        ./ld.so.cache-from-env.patch
+      ]
+    else
+      [
+        # Patch hard-coded FHS paths
+        ./adjust-paths-in-unit-tests-0.102.patch
+        # Avoid using /sbin/ldconfig
+        ./ld.so.cache-from-env-0.102.patch
+      ]
+  );
 
   nativeBuildInputs = [
     git
@@ -41,7 +55,7 @@ stdenv.mkDerivation (finalAttrs: {
   ];
 
   postPatch = ''
-    sed -ie '4i GIT_LABEL = heads/master-'$(< git-id) GNUmakefile
+    sed -i -e '/GIT_LABEL :=/c GIT_LABEL := heads/master-'$(< git-id) GNUmakefile
     # Some other hard-coded paths to fix:
     substituteInPlace extra/tzinfo/tzinfo.factor \
       --replace-fail '/usr/share/zoneinfo' '${tzdata}/share/zoneinfo'
diff --git a/pkgs/development/compilers/factor-lang/wrapper.nix b/pkgs/development/compilers/factor-lang/wrapper.nix
index 748c816be0f9..28339d54a833 100644
--- a/pkgs/development/compilers/factor-lang/wrapper.nix
+++ b/pkgs/development/compilers/factor-lang/wrapper.nix
@@ -13,10 +13,12 @@
   freealut,
   gdk-pixbuf,
   glib,
-  gtk2-x11,
-  gtkglext,
+  gtk2-x11, # to be retired with <= 0.101
+  gtkglext, # to be retired with <= 0.101
   libGL,
   libGLU,
+  gtk4,
+  libepoxy,
   librsvg,
   graphviz,
   libogg,
@@ -24,7 +26,7 @@
   openal,
   openssl,
   pango,
-  pcre,
+  pcre2,
   udis86,
   zlib,
   # Enable factor GUI support
@@ -53,7 +55,7 @@ let
     libvorbis
     openal
     openssl
-    pcre
+    pcre2
     udis86
     zlib
   ];
@@ -62,19 +64,31 @@ let
     defaultLibs
     ++ extraLibs
     ++ binPackages
-    ++ (lib.flatten (map (v: v.extraLibs or [ ]) extraVocabs))
-    ++ optionals guiSupport [
-      cairo
-      freealut
-      gdk-pixbuf
-      glib
-      gtk2-x11
-      gtkglext
-      libGL
-      libGLU
-      pango
-    ];
-  bins = binPackages ++ defaultBins ++ (lib.flatten (map (v: v.extraPaths or [ ]) extraVocabs));
+    ++ (builtins.concatMap (v: v.extraLibs or [ ]) extraVocabs)
+    ++ optionals guiSupport (
+      [
+        cairo
+        freealut
+        gdk-pixbuf
+        glib
+        libGL
+        libGLU
+        pango
+      ]
+      ++ (
+        if (versionOlder factor-unwrapped.version "0.102") then
+          [
+            gtk2-x11
+            gtkglext
+          ]
+        else
+          [
+            gtk4
+            libepoxy
+          ]
+      )
+    );
+  bins = binPackages ++ defaultBins ++ (builtins.concatMap (v: v.extraPaths or [ ]) extraVocabs);
   vocabTree = buildEnv {
     name = "${factor-unwrapped.pname}-vocabs";
     ignoreCollisions = true;
@@ -97,6 +111,9 @@ stdenv.mkDerivation (finalAttrs: {
   ];
   buildInputs = optional guiSupport gdk-pixbuf;
 
+  __structuredAttrs = true;
+  strictDeps = true;
+
   dontUnpack = true;
 
   desktopItems = [
@@ -211,6 +228,8 @@ stdenv.mkDerivation (finalAttrs: {
     runHook postInstallCheck
   '';
 
+  dontStrip = true; # Have been stripped already
+
   passthru = {
     inherit
       defaultLibs
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 5e17c94ab66c..cf9bbc3d1806 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -5452,12 +5452,18 @@ with pkgs;
       stdenv = clangStdenv;
     };
   };
-  factorPackages = factorPackages-0_101;
+  factorPackages-0_102 = callPackage ./factor-packages.nix {
+    factor-unwrapped = callPackage ../development/compilers/factor-lang/0.102.nix {
+      stdenv = clangStdenv;
+    };
+  };
+  factorPackages = factorPackages-0_102;
 
   factor-lang-0_99 = factorPackages-0_99.factor-lang;
   factor-lang-0_100 = factorPackages-0_100.factor-lang;
   factor-lang-0_101 = factorPackages-0_101.factor-lang;
-  factor-lang = factor-lang-0_101;
+  factor-lang-0_102 = factorPackages-0_102.factor-lang;
+  factor-lang = factor-lang-0_102;
 
   inherit (callPackage ../development/libraries/ffmpeg { })
     ffmpeg_4