diff --git a/pkgs/development/compilers/nvidia-cg-toolkit/default.nix b/pkgs/development/compilers/nvidia-cg-toolkit/default.nix
index 8bb201f975e7..06f1d74382ee 100644
--- a/pkgs/development/compilers/nvidia-cg-toolkit/default.nix
+++ b/pkgs/development/compilers/nvidia-cg-toolkit/default.nix
@@ -35,7 +35,8 @@ stdenv.mkDerivation rec {
     ensureDir "$out/lib/"
     [ "$system" = "x86_64-linux" ] && cp -v lib64/* "$out/lib/"
     [ "$system" = "i686-linux" ] && cp -v lib/* "$out/lib/"
-    for mandir in man1 man3 manCg manCgFX
+    for mandir in man1 man3 \
+      ${if stdenv.system == "x86_64-linux" then "manCg" else ""} manCgFX
     do
         ensureDir "$out/share/man/$mandir/"
         cp -v share/man/$mandir/* "$out/share/man/$mandir/"