diff --git a/pkgs/applications/graphics/freecad/default.nix b/pkgs/applications/graphics/freecad/default.nix
index 25a945824312..ac4050fc8c5b 100644
--- a/pkgs/applications/graphics/freecad/default.nix
+++ b/pkgs/applications/graphics/freecad/default.nix
@@ -23,6 +23,7 @@
 , opencascade-occt
 , pivy
 , pkg-config
+, ply
 , pycollada
 , pyside2
 , pyside2-tools
@@ -80,6 +81,7 @@ mkDerivation rec {
     ode
     opencascade-occt
     pivy
+    ply # for openSCAD file support
     pycollada
     pyside2
     pyside2-tools
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index edc547a7964a..9b11bc832870 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -23548,6 +23548,7 @@ in
       boost
       matplotlib
       pivy
+      ply
       pycollada
       pyside2
       pyside2-tools