diff --git a/var/spack/repos/builtin/packages/fenics-basix/package.py b/var/spack/repos/builtin/packages/fenics-basix/package.py
index 3479510a418..da61c4be4e6 100644
--- a/var/spack/repos/builtin/packages/fenics-basix/package.py
+++ b/var/spack/repos/builtin/packages/fenics-basix/package.py
@@ -18,5 +18,6 @@ class FenicsBasix(CMakePackage):
     version("0.1.0", sha256="2ab41fe6ad4f6c42f01b17a6e7c39debb4e0ae61c334d1caebee78b741bca4e7")
 
     depends_on("cmake@3.18:", type="build")
+    depends_on("xtl@0.7.2:")
     depends_on("xtensor@0.23.10:")
     depends_on("blas", type=("build", "run"))
diff --git a/var/spack/repos/builtin/packages/py-fenics-basix/package.py b/var/spack/repos/builtin/packages/py-fenics-basix/package.py
index ca3e5e9d2be..01054602dab 100644
--- a/var/spack/repos/builtin/packages/py-fenics-basix/package.py
+++ b/var/spack/repos/builtin/packages/py-fenics-basix/package.py
@@ -24,6 +24,7 @@ class PyFenicsBasix(PythonPackage):
     depends_on("python@3.7:", type=('build', 'run'))
     depends_on("py-setuptools", type="build")
     depends_on("cmake@3.18:", type="build")
+    depends_on("xtl@0.7.2:", type="build")
     depends_on("xtensor@0.23.10:", type="build")
     depends_on("py-pybind11@2.6.2:2.7.99", type="build")