diff --git a/var/spack/repos/builtin/packages/mapl/package.py b/var/spack/repos/builtin/packages/mapl/package.py
index 61ca8b94f18..e53b5cd0812 100644
--- a/var/spack/repos/builtin/packages/mapl/package.py
+++ b/var/spack/repos/builtin/packages/mapl/package.py
@@ -252,9 +252,11 @@ class Mapl(CMakePackage):
     conflicts("%gcc@13:", when="@:2.44")
 
     # MAPL can use ifx only from MAPL 2.51 onwards and only supports
-    # ifx 2025.0 and newer due to bugs in ifx
-    conflicts("%oneapi@:2024")
-    conflicts("%oneapi", when="@:2.50")
+    # ifx 2025.0 and newer due to bugs in ifx.
+    conflicts("%oneapi@2025:", when="@:2.50")
+    # NOTE there is a further check on oneapi in the cmake_args below
+    # that is hard to conflict since we don't know the fortran compiler
+    # at this point
 
     variant("flap", default=False, description="Build with FLAP support", when="@:2.39")
     variant("pflogger", default=True, description="Build with pFlogger support")
@@ -388,6 +390,22 @@ def cmake_args(self):
         if fflags:
             args.append(self.define("CMAKE_Fortran_FLAGS", " ".join(fflags)))
 
+        # If oneapi@:2024 is used and it gets past the conflict above, we might be
+        # using ifx or ifort. If we are using ifx and the MAPL version is 2.50 or older
+        # we need to raise an error
+
+        if self.spec.satisfies("@:2.50 %oneapi@:2024"):
+            # We now need to get which Fortran compiler is used here but there
+            # isn't an easy way like:
+            #   if self.spec["fortran"].name == "ifx":
+            # yet (see https://github.com/spack/spack/pull/45189)
+            # So we need to parse the output of $FC --version
+            output = spack.compiler.get_compiler_version_output(
+                self.compiler.fc, "-diag-disable=10448 --version", ignore_errors=True
+            )
+            if "ifx" in output:
+                raise InstallError("MAPL versions 2.50 and older do not support ifx")
+
         # Scripts often need to know the MPI stack used to setup the environment.
         # Normally, we can autodetect this, but building with Spack does not
         # seem to work. We need to pass in the MPI stack used to CMake