diff --git a/pkgs/by-name/di/dia/fix-build-with-poppler-26-06.patch b/pkgs/by-name/di/dia/fix-build-with-poppler-26-06.patch
new file mode 100644
index 000000000000..66c62a79d747
--- /dev/null
+++ b/pkgs/by-name/di/dia/fix-build-with-poppler-26-06.patch
@@ -0,0 +1,33 @@
+From 2373861a858fb6ee7d50870ae66a59f05c6cd4bd Mon Sep 17 00:00:00 2001
+From: Nadzeya Hutsko <nadzeya@ubuntu.com>
+Date: Wed, 22 Jul 2026 20:46:52 +0200
+Subject: [PATCH] Fix build with Poppler >= 26.06
+
+poppler 26.06 changed the Page box accessors to return a const reference
+instead of a pointer. Take the address of the result, guarded by a
+version check so older poppler still builds
+---
+ plug-ins/pdf/pdf-import.cpp | 5 +++++
+ 1 file changed, 5 insertions(+)
+
+diff --git a/plug-ins/pdf/pdf-import.cpp b/plug-ins/pdf/pdf-import.cpp
+index 3af268646..35fc6d9e3 100644
+--- a/plug-ins/pdf/pdf-import.cpp
++++ b/plug-ins/pdf/pdf-import.cpp
+@@ -93,8 +93,13 @@ public :
+                       (Annot *annot, void *user_data) G_GNUC_UNUSED,
+                   void   *annotDisplayDecideCbkData   G_GNUC_UNUSED)
+   {
++#if POPPLER_VERSION_MAJOR > 26 || (POPPLER_VERSION_MAJOR == 26 && POPPLER_VERSION_MINOR >= 6)
++    const PDFRectangle *mediaBox = &page->getMediaBox();
++    const PDFRectangle *clipBox = &page->getCropBox ();
++#else
+     const PDFRectangle *mediaBox = page->getMediaBox();
+     const PDFRectangle *clipBox = page->getCropBox ();
++#endif
+ 
+     if (page->isOk()) {
+       real w1 = (clipBox->x2 - clipBox->x1);
+-- 
+GitLab
+
diff --git a/pkgs/by-name/di/dia/package.nix b/pkgs/by-name/di/dia/package.nix
index c71a40831715..5bbd709b105d 100644
--- a/pkgs/by-name/di/dia/package.nix
+++ b/pkgs/by-name/di/dia/package.nix
@@ -50,16 +50,21 @@ let
 in
 stdenv.mkDerivation {
   pname = "dia";
-  version = "unstable-2025-10-26";
+  version = "0.97.2-unstable-2026-07-24";
 
   src = fetchFromGitLab {
     domain = "gitlab.gnome.org";
     owner = "GNOME";
     repo = "dia";
-    rev = "efdf829e8afdbbeb371820932769e35415ebe886";
-    hash = "sha256-VFFU5iJnVJdZ2tkNszZ2ooBD+GiCL6MqanzpEWIJerk=";
+    rev = "ad68cc378b7a187706bc2648c48b44d16fb80819";
+    hash = "sha256-ejjSc9GGXD5GsbeRps1T20xifJuzWA1yq/G7jk797Cw=";
   };
 
+  patches = [
+    # https://gitlab.gnome.org/GNOME/dia/-/merge_requests/146
+    ./fix-build-with-poppler-26-06.patch
+  ];
+
   postPatch = ''
     # Fix build with poppler 25.10.0
     substituteInPlace plug-ins/pdf/pdf-import.cpp \