diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 431584b9de4a73bfeb77d6abf2cc215e3a41407f..d82e306d405d453cc87cd54ac5591217f7c974ef 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -36,6 +36,9 @@ alma:
           - 105b
           - 105b_LHCB_Core
           - 105b_LHCB_7
+          - 105c
+          - 105c_LHCB_Core
+          - 105c_LHCB_7
 
 centos:
   <<: *retry_policy
diff --git a/cmake/toolchain/heptools-105c.cmake b/cmake/toolchain/heptools-105c.cmake
new file mode 100644
index 0000000000000000000000000000000000000000..c614cc1053aac707e14a74df3db0f175676d5517
--- /dev/null
+++ b/cmake/toolchain/heptools-105c.cmake
@@ -0,0 +1,18 @@
+#---List of externals----------------------------------------------
+set(LCG_PYTHON_VERSION 3)
+include(heptools-dev-base)
+
+#---Additional External packages------(Generators)-----------------
+include(heptools-dev-generators)
+
+LCG_external_package(ROOT 6.30.08)
+LCG_external_package(DD4hep 01.29)
+
+
+#---Apple MacOS special removals and overwrites--------------------
+include(heptools-macos)
+
+if(LCG_ARCH MATCHES "aarch64")
+  include(heptools-devARM)
+endif()
+
diff --git a/cmake/toolchain/heptools-105c_LHCB_7.cmake b/cmake/toolchain/heptools-105c_LHCB_7.cmake
new file mode 100644
index 0000000000000000000000000000000000000000..9c48d9caf29a2158e13edfe861fb43b233870215
--- /dev/null
+++ b/cmake/toolchain/heptools-105c_LHCB_7.cmake
@@ -0,0 +1,7 @@
+#---List of externals----------------------------------------------
+set(LCG_PYTHON_VERSION 3)
+include(heptools-105c)
+
+SET(LHCB_JSON_FILE https://gitlab.cern.ch/lhcb-core/rpm-recipes/-/raw/master/LHCBEXTERNALS/105/LHCBEXTERNALS_105c_LHCB_7.json)
+
+include(heptools-lhcbsetup)
diff --git a/cmake/toolchain/heptools-105c_LHCB_Core.cmake b/cmake/toolchain/heptools-105c_LHCB_Core.cmake
new file mode 100644
index 0000000000000000000000000000000000000000..1546801827724fb3ed2cb53465c36dfc84482eff
--- /dev/null
+++ b/cmake/toolchain/heptools-105c_LHCB_Core.cmake
@@ -0,0 +1,7 @@
+#---List of externals----------------------------------------------
+set(LCG_PYTHON_VERSION 3)
+include(heptools-105c)
+
+SET(LHCB_JSON_FILE https://gitlab.cern.ch/lhcb-core/rpm-recipes/-/raw/master/LHCBEXTERNALS/105/LHCBEXTERNALS_105c_LHCB_Core.json)
+
+include(heptools-lhcbsetup)