diff --git a/var/spack/repos/builtin/packages/otf-cpt/package.py b/var/spack/repos/builtin/packages/otf-cpt/package.py
new file mode 100644
index 0000000000..933a293041
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+++ b/var/spack/repos/builtin/packages/otf-cpt/package.py
@@ -0,0 +1,35 @@
+# Copyright 2013-2024 Lawrence Livermore National Security, LLC and other
+# Spack Project Developers. See the top-level COPYRIGHT file for details.
+#
+# SPDX-License-Identifier: (Apache-2.0 OR MIT)
+
+from spack.package import *
+
+
+class OtfCpt(CMakePackage):
+    """Tool to collect and report model factors (aka. fundamental performance factors)
+    for hybrid MPI + OpenMP applications on-the-fly."""
+
+    # Add a proper url for your package's homepage here.
+    homepage = (
+        "https://github.com/RWTH-HPC/OTF-CPT?tab=readme-ov-file#on-the-fly-critical-path-tool"
+    )
+    git = "https://github.com/RWTH-HPC/OTF-CPT.git"
+
+    maintainers("jgraciahlrs", "jprotze")
+
+    license("Apache-2.0", checked_by="jgraciahlrs")
+
+    version("0.9", tag="v0.9")
+
+    depends_on("mpi")
+    conflicts(
+        "%gcc",
+        msg="GCC compilers currently do not support OMPT, please use a clang-like compiler.",
+    )
+
+    patch(
+        "https://github.com/RWTH-HPC/OTF-CPT/commit/b58f83588a4c231b71ca48dcddd909e1ab318cc6.diff?full_index=1",
+        sha256="35fadc3e61e5b7aa3a68272f701af3a242e30a435f1ddd679577ba35c7496565",
+        when="@0.9",
+    )