nix-env -qas doesn't work

[chamini2]

When I run nix-env -qas it complains about attribute gcc missing.

$ nix-env -qas --show-trace
error: while evaluating the attribute ‘cc’ of the derivation ‘ccache-links-wrapper’ at /Users/user/.joelteon-nixpkgs/pkgs/build-support/cc-wrapper/default.nix:31:3:
while evaluating the attribute ‘buildCommand’ of the derivation ‘ccache-links’ at /Users/user/.joelteon-nixpkgs/pkgs/build-support/trivial-builders.nix:10:14:
attribute ‘gcc’ missing, at /Users/user/.joelteon-nixpkgs/pkgs/development/tools/misc/ccache/default.nix:20:20

When checking the file, the error appears to occur on this line:

cat > $out/bin/gcc << EOF