I am uploading a NMU to fix this.
Please find the debdiff attached.
diff -Nru alkimia-8.1.2/debian/changelog alkimia-8.1.2/debian/changelog
--- alkimia-8.1.2/debian/changelog 2023-10-21 08:00:21.000000000 +0200
+++ alkimia-8.1.2/debian/changelog 2025-02-19 12:20:52.000000000 +0100
@@ -1,3 +1,10 @@
+alkimia (8.1.2-2.1) unstable; urgency=medium
+
+ * Non-maintainer upload.
+ * Drop unnecessary Build-Depends: libqt5webkit5-dev. (Closes: #1098334)
+
+ -- Bastian Germann <b...@debian.org> Wed, 19 Feb 2025 12:20:52 +0100
+
alkimia (8.1.2-2) unstable; urgency=medium
* Team upload.
diff -Nru alkimia-8.1.2/debian/control alkimia-8.1.2/debian/control
--- alkimia-8.1.2/debian/control 2023-10-21 07:43:04.000000000 +0200
+++ alkimia-8.1.2/debian/control 2025-02-19 12:20:42.000000000 +0100
@@ -18,7 +18,6 @@
libkf5plasma-dev,
libkf5textwidgets-dev,
libkf5xmlgui-dev,
- libqt5webkit5-dev,
pkg-config,
pkg-kde-tools (>= 0.5.0),
qtbase5-dev,
