diff --git a/scripts/nix-install-package.in b/scripts/nix-install-package.in
index 4dc241ab76..f067af43d9 100644
--- a/scripts/nix-install-package.in
+++ b/scripts/nix-install-package.in
@@ -11,6 +11,7 @@ die unless defined $pkgFile;
 # from a web browser, the user gets to see us.
 if (!defined $ENV{"NIX_HAVE_TERMINAL"}) {
     $ENV{"NIX_HAVE_TERMINAL"} = "1";
+    $ENV{"LD_LIBRARY_PATH"} = "";
     exec("xterm", "-e", "@shell@", "-c", "@bindir@/nix-install-package '$pkgFile' || read");
     die "cannot execute `xterm'";
 }
@@ -43,7 +44,7 @@ system "@bindir@/nix-pull '$manifestURL'";
 die if $? != 0;
 
 print "\nInstalling package...\n";
-system "@bindir@/nix-env -i '$drvPath'";
+system "@bindir@/nix-env -i '$outPath'";
 die if $? != 0;
 
 print "\nInstallation succeeded! Press Enter to continue.\n";
diff --git a/scripts/nix-prefetch-url.in b/scripts/nix-prefetch-url.in
index ed3ad87e49..23cc617ca4 100644
--- a/scripts/nix-prefetch-url.in
+++ b/scripts/nix-prefetch-url.in
@@ -32,7 +32,7 @@ if test -z "$hash"; then
     @curl@ --fail --location --max-redirs 20 "$url" > $tmpPath1
 
     # Compute the hash.
-    hash=$(@bindir@/nix-hash --base32 --type "$hashType" --flat $tmpPath1)
+    hash=$(@bindir@/nix-hash --type "$hashType" --flat $tmpPath1)
     if ! test -n "$QUIET"; then echo "hash is $hash" >&2; fi
 
     # Rename it so that the fetchurl builder can find it.