diff --git a/var/spack/repos/builtin/packages/genfit/package.py b/var/spack/repos/builtin/packages/genfit/package.py
index 182f366020..eef453201f 100644
--- a/var/spack/repos/builtin/packages/genfit/package.py
+++ b/var/spack/repos/builtin/packages/genfit/package.py
@@ -19,6 +19,10 @@ class Genfit(CMakePackage):
     tags = ["hep"]
 
     version("master", branch="master")
+    version("02-00-05", sha256="8c37d1692e592f9f28a145c38aa41b0a6ed9211947846e9d10e34a2759ee446e")
+    version("02-00-04", sha256="b833e40cfe5343424262d28f9cb715fc80255313a985508453ac17c3a522b273")
+    version("02-00-03", sha256="23bb4c26740be96bd7933d30f3b683c6246b8f349116bc43d1c85117682e7a4b")
+    version("02-00-02", sha256="b415abec7466d7fd15de6c37cd970c07a6581fe303fdfa3a8bc9258ea1c19d7d")
     version("02-00-01", sha256="e5a3eabf1ab53178fbd40aff0a8071bf48bac558ba1b798769106ccf230c4120")
     version("02-00-00", sha256="0bfd5dd152ad0573daa4153a731945824e0ce266f844988b6a8bebafb7f2dacc")
     # Untagged version from 2017-06-23 known to work with root@6.16.00
@@ -29,14 +33,18 @@ class Genfit(CMakePackage):
     depends_on("eigen")
     depends_on("googletest")
 
+    # See https://github.com/GenFit/GenFit/pull/127
+    conflicts("root@6.30:", when="@:02-00-04", msg="genfit cannot be built against root@6.30 ")
+
     def cmake_args(self):
         args = []
-        # normally, as a cmake package root should be
-        # automatically picked up after 'depends_on'
-        # as it is added to CMAKE_PREFIX_PATH
-        # but genfit cooks its own root cmake config
-        # so this workaround is needed for now.
-        root_prefix = self.spec["root"].prefix
-        args.append("-DROOT_DIR=%s" % root_prefix)
+        if self.spec.satisfies("@:02-00-04"):
+            # normally, as a cmake package root should be
+            # automatically picked up after 'depends_on'
+            # as it is added to CMAKE_PREFIX_PATH
+            # but genfit cooks its own root cmake config
+            # so this workaround is needed for now.
+            root_prefix = self.spec["root"].prefix
+            args.append("-DROOT_DIR=%s" % root_prefix)
 
         return args