diff --git a/pkgs/tools/misc/mandoc/default.nix b/pkgs/tools/misc/mandoc/default.nix
index 96c04c092b0..e8553b7f9e5 100644
--- a/pkgs/tools/misc/mandoc/default.nix
+++ b/pkgs/tools/misc/mandoc/default.nix
@@ -24,7 +24,7 @@ stdenv.mkDerivation rec {
   configureLocal = ''
     MANPATH_DEFAULT="/run/current-system/sw/share/man"
     MANPATH_BASE="$MANPATH_DEFAULT"
-    OSNAME="NixOS"
+    OSNAME="Nixpkgs"
     PREFIX="$out"
     LD_OHASH="-lutil"
     # Use symlinks instead of hardlinks (more commonly used in nixpkgs)