diff --git a/packages/sleef/package.py b/packages/sleef/package.py
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+++ b/packages/sleef/package.py
@@ -0,0 +1,63 @@
+# Copyright 2013-2023 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 Sleef(CMakePackage):
+    """SIMD Library for Evaluating Elementary Functions, vectorized libm and DFT."""
+
+    homepage = "https://sleef.org"
+    url = "https://github.com/shibatch/sleef/archive/3.2.tar.gz"
+    git = "https://github.com/shibatch/sleef.git"
+
+    version("master", branch="master")
+    version("3.5.1_2020-12-22", commit="e0a003ee838b75d11763aa9c3ef17bf71a725bff")  # py-torch@1.8:
+    version(
+        "3.5.1",
+        sha256="415ee9b1bcc5816989d3d4d92afd0cd3f9ee89cbd5a33eb008e69751e40438ab",
+        preferred=True,
+    )
+    version(
+        "3.4.0_2019-07-30", commit="7f523de651585fe25cade462efccca647dcc8d02"
+    )  # py-torch@1.3:1.7
+    version(
+        "3.4.0_2019-05-13",
+        commit="9b249c53a80343cc1a394ca961d7d5696ea76409",  # py-torch@1.2
+        git="https://github.com/zdevito/sleef.git",
+    )
+    version(
+        "3.3.1_2018-12-09",
+        commit="191f655caa25526ae226cf88dd2529265176014a",  # py-torch@1.1
+        git="https://github.com/zdevito/sleef.git",
+    )
+    version(
+        "3.2_2018-05-09", commit="6ff7a135a1e31979d1e1844a2e7171dfbd34f54f"
+    )  # py-torch@0.4.1:1.0
+    version("3.2", sha256="3130c5966e204e6d6a3ace81e543d12b5b21f60897f1c185bfa587c1bd77bee2")
+
+    # https://github.com/shibatch/sleef/issues/474
+    conflicts("%apple-clang@15:")
+
+    generator("ninja")
+    depends_on("cmake@3.4.3:", type="build")
+
+    # # https://github.com/shibatch/sleef/issues/475
+    # depends_on("fftw-api")
+    # depends_on("mpfr")
+    # depends_on("openssl")
+
+    # # https://github.com/shibatch/sleef/issues/458
+    # conflicts("^mpfr@4.2:")
+
+    # begin EBRAINS (modified): removed "disable shared lib build" to fix py-torch
+    #                           this was fixed upstream in 8c061e51.
+    def cmake_args(self):
+        # https://salsa.debian.org/science-team/sleef/-/blob/master/debian/rules
+        return [
+            self.define("BUILD_DFT", False),
+            self.define("BUILD_TESTS", False),
+        ]
+    # end EBRAINS