diff --git a/lib/spack/spack/package.py b/lib/spack/spack/package.py
index db1ff92a5bc..8675435492c 100644
--- a/lib/spack/spack/package.py
+++ b/lib/spack/spack/package.py
@@ -691,8 +691,7 @@ def module(self):
 
     def install(self, spec, prefix):
         """Package implementations override this with their own build configuration."""
-        configure()
-        #tty.die("Packages must provide an install method!")
+        tty.die("Packages must provide an install method!")
 
 
     def do_uninstall(self):
diff --git a/lib/spack/spack/packages/libelf.py b/lib/spack/spack/packages/libelf.py
index abfbd0bde7f..f663ba750d6 100644
--- a/lib/spack/spack/packages/libelf.py
+++ b/lib/spack/spack/packages/libelf.py
@@ -36,12 +36,12 @@ class Libelf(Package):
     versions = { '0.8.13' : '4136d7b4c04df68b686570afa26988ac',
                  '0.8.12' : 'e21f8273d9f5f6d43a59878dc274fec7', }
 
-    # def install(self, spec, prefix):
-    #     configure("--prefix=" + prefix,
-    #               "--enable-shared",
-    #               "--disable-dependency-tracking",
-    #               "--disable-debug")
-    #     make()
+    def install(self, spec, prefix):
+        configure("--prefix=" + prefix,
+                  "--enable-shared",
+                  "--disable-dependency-tracking",
+                  "--disable-debug")
+        make()
 
-    #     # The mkdir commands in libelf's install can fail in parallel
-    #     make("install", parallel=False)
+        # The mkdir commands in libelf's install can fail in parallel
+        make("install", parallel=False)