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-rw-r--r--corepkgs/Makefile.am2
-rw-r--r--corepkgs/nar/unnar.fix8
-rw-r--r--corepkgs/nar/unnar.sh3
3 files changed, 13 insertions, 0 deletions
diff --git a/corepkgs/Makefile.am b/corepkgs/Makefile.am
index 9ce9c8c790eb..9298865bff2f 100644
--- a/corepkgs/Makefile.am
+++ b/corepkgs/Makefile.am
@@ -6,3 +6,5 @@ install-data-local:
 	$(INSTALL) -d $(datadir)/fix/nar
 	$(INSTALL_DATA) nar/nar.fix $(datadir)/fix/nar
 	$(INSTALL_DATA) nar/nar.sh $(datadir)/fix/nar
+	$(INSTALL_DATA) nar/unnar.fix $(datadir)/fix/nar
+	$(INSTALL_DATA) nar/unnar.sh $(datadir)/fix/nar
diff --git a/corepkgs/nar/unnar.fix b/corepkgs/nar/unnar.fix
new file mode 100644
index 000000000000..db97750aaa18
--- /dev/null
+++ b/corepkgs/nar/unnar.fix
@@ -0,0 +1,8 @@
+Function(["nar", "name"],
+  Package(
+    [ ("name", Var("name"))
+    , ("build", Relative("nar/unnar.sh"))
+    , ("nar", Var("nar"))
+    ]
+  )
+)
\ No newline at end of file
diff --git a/corepkgs/nar/unnar.sh b/corepkgs/nar/unnar.sh
new file mode 100644
index 000000000000..e6a3f3c1fe19
--- /dev/null
+++ b/corepkgs/nar/unnar.sh
@@ -0,0 +1,3 @@
+#! /bin/sh
+
+/tmp/nix/bin/nix --restore "$out" < $nar || exit 1