diff --git a/pkgs/applications/misc/prusa-slicer/default.nix b/pkgs/applications/misc/prusa-slicer/default.nix
index 679b77157cd05..5343b529b339b 100644
--- a/pkgs/applications/misc/prusa-slicer/default.nix
+++ b/pkgs/applications/misc/prusa-slicer/default.nix
@@ -126,6 +126,11 @@ stdenv.mkDerivation rec {
     # Since version 2.5.0 of nlopt we need to link to libnlopt, as libnlopt_cxx
     # now seems to be integrated into the main lib.
     sed -i 's|nlopt_cxx|nlopt|g' cmake/modules/FindNLopt.cmake
+
+    # Disable test_voronoi.cpp as the assembler hangs during build,
+    # likely due to commit e682dd84cff5d2420fcc0a40508557477f6cc9d3
+    # See issue #185808 for details.
+    sed -i 's|test_voronoi.cpp||g' tests/libslic3r/CMakeLists.txt
   '';
 
   src = fetchFromGitHub {