diff --git a/kde-apps/kalzium/Manifest b/kde-apps/kalzium/Manifest
index 2ba2fdfbacafa..431396fe3570d 100644
--- a/kde-apps/kalzium/Manifest
+++ b/kde-apps/kalzium/Manifest
@@ -1,2 +1,3 @@
 DIST kalzium-24.02.2.tar.xz 24646968 BLAKE2B 6f2a81542a66bc553fe1b7177ad2dae6b314c01ab72d3d6e26771199dd0b680f29d5c2665cecf4c87e3d5376a9d81f5f5c4a8670f346ce813b3ab0101c1020e9 SHA512 7cf5c46a175014c61766a2c0edcac2ca66405053c85a842b40ceca8afbfc5f9130f684b146f54626558d14c70e95f1684d116004816ee5899bd5b4f668947b21
 DIST kalzium-24.05.0.tar.xz 22664932 BLAKE2B 56aeac4b5f542914efabbb4e33e02bb51eb1fa87802280f7e9acd8db9c7a0b011f79043c8ebaf5703aec475e61e8ab5b0658479e90d8645042fc9500840ea4c6 SHA512 f9b935905f98adf9ed924d394c29e785722b1fbe0351c3e6b9d74562af4a986d5cf42f172f84117fad1beb1a22f33cd4ac9b675404bb230ec452e633136beec2
+DIST kalzium-24.05.1.tar.xz 22660092 BLAKE2B d5f636b415c8110774615eebf4bf81843f374c08e36d00768ce6d27a0bdf918d95634953c05e5d0529ee6f731ad7703c59b87ddd751637f55ed99587a2a38ece SHA512 556febc3c49ece2e1387df1139c1b4b12bf29d64df1129d8b4e540bc9c12154eb593fca74217fe62901354d30c778eb715140af861b6dda1c6c7a2d0229bcb7c
diff --git a/kde-apps/kalzium/kalzium-24.05.1.ebuild b/kde-apps/kalzium/kalzium-24.05.1.ebuild
new file mode 100644
index 0000000000000..2c18c831f38db
--- /dev/null
+++ b/kde-apps/kalzium/kalzium-24.05.1.ebuild
@@ -0,0 +1,66 @@
+# Copyright 1999-2024 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+ECM_HANDBOOK="forceoptional"
+KFMIN=5.115.0
+QTMIN=5.15.12
+inherit ecm gear.kde.org flag-o-matic
+
+DESCRIPTION="Periodic table of the elements"
+HOMEPAGE="https://apps.kde.org/kalzium/ https://edu.kde.org/kalzium/"
+
+LICENSE="GPL-2" # TODO: CHECK
+SLOT="5"
+KEYWORDS="~amd64 ~arm64 ~x86"
+IUSE="editor solver"
+
+DEPEND="
+	>=dev-qt/qtgui-${QTMIN}:5
+	>=dev-qt/qtscript-${QTMIN}:5
+	>=dev-qt/qtsvg-${QTMIN}:5
+	>=dev-qt/qtwidgets-${QTMIN}:5
+	>=dev-qt/qtxml-${QTMIN}:5
+	>=kde-frameworks/kcompletion-${KFMIN}:5
+	>=kde-frameworks/kconfig-${KFMIN}:5
+	>=kde-frameworks/kconfigwidgets-${KFMIN}:5
+	>=kde-frameworks/kcoreaddons-${KFMIN}:5
+	>=kde-frameworks/ki18n-${KFMIN}:5
+	>=kde-frameworks/kio-${KFMIN}:5
+	>=kde-frameworks/kitemviews-${KFMIN}:5
+	>=kde-frameworks/kplotting-${KFMIN}:5
+	>=kde-frameworks/ktextwidgets-${KFMIN}:5
+	>=kde-frameworks/kunitconversion-${KFMIN}:5
+	>=kde-frameworks/kwidgetsaddons-${KFMIN}:5
+	>=kde-frameworks/kxmlgui-${KFMIN}:5
+	editor? (
+		dev-cpp/eigen:3
+		>=dev-qt/qtopengl-${QTMIN}:5
+		>=kde-frameworks/knewstuff-${KFMIN}:5
+		sci-chemistry/openbabel:=
+		>=sci-libs/avogadrolibs-1.93[qt5]
+	)
+	solver? ( dev-ml/facile:=[ocamlopt] )
+"
+RDEPEND="${DEPEND}
+	sci-chemistry/chemical-mime-data
+"
+
+PATCHES=( "${FILESDIR}/${PN}-21.03.90-cmake.patch" )
+
+src_configure() {
+	# Fix missing finite()
+	[[ ${CHOST} == *-solaris* ]] && append-cppflags -DHAVE_IEEEFP_H
+
+	local mycmakeargs=(
+		-DCMAKE_DISABLE_FIND_PACKAGE_OpenBabel3=ON # TODO: bug 823101
+		$(cmake_use_find_package editor Eigen3)
+		$(cmake_use_find_package editor AvogadroLibs)
+		$(cmake_use_find_package editor OpenBabel2)
+		$(cmake_use_find_package solver OCaml)
+		$(cmake_use_find_package solver Libfacile)
+	)
+
+	ecm_src_configure
+}