diff --git a/pkgs/development/libraries/skalibs/default.nix b/pkgs/development/libraries/skalibs/default.nix
index 474073f30e41..e5443c5d53a0 100644
--- a/pkgs/development/libraries/skalibs/default.nix
+++ b/pkgs/development/libraries/skalibs/default.nix
@@ -18,6 +18,9 @@ buildPackage {
     "--dynlibdir=\${lib}/lib"
     "--includedir=\${dev}/include"
     "--sysdepdir=\${lib}/lib/skalibs/sysdeps"
+    # Empty the default path, which would be "/usr/bin:bin".
+    # It would be set when PATH is empty. This hurts hermeticity.
+    "--with-default-path="
   ];
 
   postInstall = ''