diff --git a/default.nix b/default.nix
index 5410216..f103cd2 100644
--- a/default.nix
+++ b/default.nix
@@ -26,7 +26,7 @@
   libxtst,
   libICE,
   libfontenc,
-  libXcb,
+  libxcb,
   libX11,
   libXext,
   libXrender,
@@ -193,7 +193,7 @@ stdenv.mkDerivation {
     libxtst
     libICE
     libfontenc
-    libXcb
+    libxcb
     libX11
     libXext
     libXrender