diff --git a/configs/templates/neptune-dev/spack.yaml b/configs/templates/neptune-dev/spack.yaml
index 9f88eb883..3e03f9164 100644
--- a/configs/templates/neptune-dev/spack.yaml
+++ b/configs/templates/neptune-dev/spack.yaml
@@ -8,8 +8,8 @@ spack:
   definitions:
   - compilers: ['%aocc', '%apple-clang', '%gcc', '%intel', '%oneapi']
   - packages:
-      - neptune-env +espc                                 ^esmf@=8.8.0b10
-      - neptune-python-env +xnrl +cylc ^neptune-env +espc ^esmf@=8.8.0b10
+      - neptune-env +espc                           ^esmf@=8.8.0b10
+      - neptune-python-env +xnrl ^neptune-env +espc ^esmf@=8.8.0b10
 
   specs:
     - matrix:
diff --git a/spack-ext/repos/spack-stack/packages/neptune-python-env/package.py b/spack-ext/repos/spack-stack/packages/neptune-python-env/package.py
index 18837b9f1..2e20105b8 100644
--- a/spack-ext/repos/spack-stack/packages/neptune-python-env/package.py
+++ b/spack-ext/repos/spack-stack/packages/neptune-python-env/package.py
@@ -20,7 +20,6 @@ class NeptunePythonEnv(BundlePackage):
     version("1.5.0")
 
     variant("xnrl", default=False, description="Build non-pulic XNRL")
-    variant("cylc", default=False, description="Build cylc")
 
     depends_on("neptune-env", type="run")
     # Enable the Python variant for ESMF
@@ -41,7 +40,4 @@ class NeptunePythonEnv(BundlePackage):
     with when("+xnrl"):
         depends_on("py-xnrl", type="run")
 
-    with when("+cylc"):
-        depends_on("py-cylc-flow", type="run")
-
     # There is no need for install() since there is no code.