diff --git a/pkgs/applications/audio/ir.lv2/default.nix b/pkgs/applications/audio/ir.lv2/default.nix
index 804d6e7d4e4..d6dbc4c55a9 100644
--- a/pkgs/applications/audio/ir.lv2/default.nix
+++ b/pkgs/applications/audio/ir.lv2/default.nix
@@ -17,10 +17,9 @@ stdenv.mkDerivation rec {
   '';
 
   installPhase = ''
-    mkdir "$out/bin"
+    mkdir -p "$out/bin"
     mkdir "$out/include"
-    mkdir "$out/share"
-    mkdir "$out/share/doc"
+    mkdir -p "$out/share/doc"
 
     make PREFIX="$out" install
     install -Dm755 convert4chan "$out/bin/convert4chan"