diff --git a/pkgs/build-support/upstream-updater/attrset-to-dir.sh b/pkgs/build-support/upstream-updater/attrset-to-dir.sh
index 0e0c50e12598..2d99ef110a1c 100755
--- a/pkgs/build-support/upstream-updater/attrset-to-dir.sh
+++ b/pkgs/build-support/upstream-updater/attrset-to-dir.sh
@@ -1,8 +1,8 @@
 #! /bin/sh
 
 [ -n "$2" ] && NIXPKGS_ALL="$2";
-[ -z "$NIXPKGS_ALL" ] && [ -f "/etc/nixos/nixpkgs" ] && NIXPKGS_ALL="/etc/nixos/nixpkgs";
-[ -z "$NIXPKGS_ALL" ] && [ -f "$HOME/nixpkgs" ] && NIXPKGS_ALL="$HOME/nixpkgs";
+[ -z "$NIXPKGS_ALL" ] && [ -d "/etc/nixos/nixpkgs" ] && NIXPKGS_ALL="/etc/nixos/nixpkgs";
+[ -z "$NIXPKGS_ALL" ] && [ -d "$HOME/nixpkgs" ] && NIXPKGS_ALL="$HOME/nixpkgs";
 [ -z "$NIXPKGS_ALL" ] && {
   echo "Cannot find Nixpkgs source. Please specify it via NIXPKGS_ALL or second command line argument"
   exit 1
diff --git a/pkgs/development/compilers/sbcl/src-for-default.nix b/pkgs/development/compilers/sbcl/src-for-default.nix
index 66e389947a0a..467ed05a6a44 100644
--- a/pkgs/development/compilers/sbcl/src-for-default.nix
+++ b/pkgs/development/compilers/sbcl/src-for-default.nix
@@ -1,9 +1,9 @@
 rec {
-   version="1.0.56";
-   name="sbcl-1.0.56";
-   hash="0cq5hyzv3nnva0y1y6zjyd7rfdwwpxswnvmbfmqvhihz72ivyl1w";
-   url="http://downloads.sourceforge.net/project/sbcl/sbcl/1.0.56/sbcl-1.0.56-source.tar.bz2";
-   advertisedUrl="http://downloads.sourceforge.net/project/sbcl/sbcl/1.0.56/sbcl-1.0.56-source.tar.bz2";
+   version="1.0.57";
+   name="sbcl-1.0.57";
+   hash="1vvifyq0lapx6p6wz6jknsgch3lbyr7m785844wdgkdx2hh8ch51";
+   url="http://downloads.sourceforge.net/project/sbcl/sbcl/1.0.57/sbcl-1.0.57-source.tar.bz2";
+   advertisedUrl="http://downloads.sourceforge.net/project/sbcl/sbcl/1.0.57/sbcl-1.0.57-source.tar.bz2";
   
   
 }