* Switched from wget to curl.

* Made the dependencies on bzip2 and the shell explicit.

corepkgs/nar/nar.sh.in

@@ -1,12 +1,13 @@
-#! /bin/sh
+#! @shell@ -e
 
+# !!! impure; fix this
 export PATH=/bin:/usr/bin
 
 echo "packing $path into $out..."
-mkdir $out || exit 1
-dst=$out/`basename $path`.nar.bz2
-@bindir@/nix-store --dump "$path" | bzip2 > $dst || exit 1
+mkdir $out
+dst=$out/$(basename $path).nar.bz2
+@bindir@/nix-store --dump "$path" | @bzip2@ > $dst
 
 md5=$(md5sum -b $dst | cut -c1-32)
 if test $? != 0; then exit 1; fi
-echo $md5 > $out/md5 || exit 1
+echo $md5 > $out/md5