diff --git a/Makefile.lib b/Makefile.lib
index d197fa6c1c..1c4ada9c2e 100644
--- a/Makefile.lib
+++ b/Makefile.lib
@@ -92,11 +92,19 @@ define PROGRAMS_template =
   _srcs := $$(foreach src, $$($(1)_SOURCES), $$(_d)/$$(src))
   $(1)_OBJS := $$(addsuffix .o, $$(basename $$(_srcs)))
   _libs := $$(foreach lib, $$($(1)_LIBS), $$($$(lib)_NAME))
-  _prog := $$(_d)/$(1)
+  $(1)_PATH := $$(_d)/$(1)
 
-  $$(_prog): $$($(1)_OBJS) $$(_libs)
+  $$($(1)_PATH): $$($(1)_OBJS) $$(_libs)
 	$(QUIET) $(CXX) -o $$@ -Wl,--no-copy-dt-needed-entries $$($(1)_OBJS) $$($(1)_LDFLAGS) $$(foreach lib, $$($(1)_LIBS), $$($$(lib)_LDFLAGS_USE))
 
+  $(1)_INSTALL_PATH := $$(bindir)/$(1)
+
+  $$($(1)_INSTALL_PATH): $$($(1)_PATH)
+	mkdir -p $$(dir $$@)
+	cp $$< $$@
+
+  install:: $$($(1)_INSTALL_PATH)
+
   # Propagate CXXFLAGS to the individual object files.
   $$(foreach obj, $$($(1)_OBJS), $$(eval $$(obj)_CXXFLAGS=$$($(1)_CXXFLAGS)))
 
diff --git a/Makefile.new b/Makefile.new
index 1ae88d42fe..646f438480 100644
--- a/Makefile.new
+++ b/Makefile.new
@@ -8,7 +8,8 @@ SUBS = \
   src/nix-store/Makefile.new \
   src/nix-instantiate/Makefile.new \
   src/nix-env/Makefile.new \
-  src/nix-daemon/Makefile.new
+  src/nix-daemon/Makefile.new \
+  corepkgs/Makefile.new
 
 GLOBAL_CXXFLAGS = -I . -I src -I src/libutil -I src/libstore -I src/libmain -I src/libexpr
 
diff --git a/src/libexpr/primops.cc b/src/libexpr/primops.cc
index 9c9d202eda..bb6739d205 100644
--- a/src/libexpr/primops.cc
+++ b/src/libexpr/primops.cc
@@ -1322,6 +1322,7 @@ void EvalState::createBaseEnv()
     /* Add a wrapper around the derivation primop that computes the
        `drvPath' and `outPath' attributes lazily. */
     string path = findFile("nix/derivation.nix");
+    assert(!path.empty());
     sDerivationNix = symbols.create(path);
     evalFile(path, v);
     addConstant("derivation", v);