diff --git a/var/spack/repos/builtin/packages/evtgen/package.py b/var/spack/repos/builtin/packages/evtgen/package.py
index 514fe026265..641d3d57952 100644
--- a/var/spack/repos/builtin/packages/evtgen/package.py
+++ b/var/spack/repos/builtin/packages/evtgen/package.py
@@ -53,3 +53,6 @@ def build(self, spec, prefix):
         # due to libext_shared depending on lib_shared
         make('lib_shared')
         make('all')
+
+    def setup_run_environment(self, env):
+        env.set("EVTGEN", self.prefix.share)