diff --git a/pkgs/development/libraries/libcommuni/default.nix b/pkgs/development/libraries/libcommuni/default.nix
index e8debfda1de..008311c620c 100644
--- a/pkgs/development/libraries/libcommuni/default.nix
+++ b/pkgs/development/libraries/libcommuni/default.nix
@@ -15,11 +15,12 @@ stdenv.mkDerivation rec {
 
   enableParallelBuild = true;
 
-  configurePhase = ''
-    sed -i -e 's|/bin/pwd|pwd|g' configure
-    ./configure -config release -prefix $out -qmake ${qt5.qtbase}/bin/qmake
+  postPatch = ''
+    sed -i -e 's|/bin/pwd|pwd|g' -e 's/which/type -P/' configure
   '';
 
+  configureFlags = [ "-config release" ];
+
   meta = with stdenv.lib; {
     description = "A cross-platform IRC framework written with Qt";
     homepage = https://communi.github.io;