diff --git a/repos/spack_repo/builtin/packages/professor/package.py b/repos/spack_repo/builtin/packages/professor/package.py
index 67709dea16e..9da71472dee 100644
--- a/repos/spack_repo/builtin/packages/professor/package.py
+++ b/repos/spack_repo/builtin/packages/professor/package.py
@@ -13,9 +13,12 @@ class Professor(Package):
 
     homepage = "https://professor.hepforge.org/"
     url = "https://professor.hepforge.org/downloads/?f=Professor-2.3.3.tar.gz"
+    git = "https://gitlab.com/hepcedar/professor"
+    list_url = "https://professor.hepforge.org/downloads/"
 
     maintainers("mjk655")
 
+    version("2.5.6", sha256="7537f23078bd56f00e67e1f96c7a24026b255cc26907ad5d5234b8371e49b3c7")
     version("2.3.3", sha256="60c5ba00894c809e2c31018bccf22935a9e1f51c0184468efbdd5d27b211009f")
 
     variant(
@@ -25,23 +28,35 @@ class Professor(Package):
     )
 
     depends_on("cxx", type="build")  # generated
+    depends_on("gmake", type="build")
+    depends_on("py-pip", type="build")
 
     depends_on("yoda")
     depends_on("eigen")
     depends_on("py-cython")
     depends_on("py-iminuit")
+    depends_on("py-iminuit@2:", when="@2.4:")
     depends_on("py-matplotlib")
     depends_on("py-matplotlib backend=wx", when="+interactive")
     depends_on("root")
-    depends_on("gmake", type="build")
 
     extends("python")
 
+    def patch(self):
+        filter_file("PROF_ROOT=$(PWD)", "PROF_ROOT=$(CURDIR)", "Makefile", string=True)
+
     def setup_build_environment(self, env: EnvironmentModifications) -> None:
         env.set("PROF_VERSION", self.spec.version)
 
+    @run_before("install", when="@2.5.0:")
+    def configure(self, spec, prefix):
+        with working_dir(self.stage.source_path):
+            configure = Executable("configure")
+            configure(f"--prefix={prefix}", f"--with-eigen={self.spec['eigen'].prefix}")
+
     def install(self, spec, prefix):
-        make()
-        make("PREFIX={0}".format(prefix), "install")
+        with working_dir(self.stage.source_path):
+            make()
+            make("PREFIX={0}".format(prefix), "install")
         if self.spec.satisfies("~interactive"):
             os.remove(join_path(prefix.bin, "prof2-I"))
diff --git a/stacks/hep/spack.yaml b/stacks/hep/spack.yaml
index 6d7a2dc8752..6df9c49c0ae 100644
--- a/stacks/hep/spack.yaml
+++ b/stacks/hep/spack.yaml
@@ -118,7 +118,7 @@ spack:
   - pandorasdk
   - photos +hepmc3
   - podio +rntuple +sio
-  #- professor
+  - professor
   - py-awkward
   - py-boost-histogram
   - py-dask-awkward ~io