diff --git a/pkgs/development/python-modules/kaleido/default.nix b/pkgs/development/python-modules/kaleido/default.nix
index bfe516b8f886..5932fd4a8172 100644
--- a/pkgs/development/python-modules/kaleido/default.nix
+++ b/pkgs/development/python-modules/kaleido/default.nix
@@ -65,37 +65,39 @@ buildPythonPackage rec {
 
   pythonImportsCheck = [ "kaleido" ];
 
-  postInstall = ''
-    # Expose kaleido binary
-    mkdir -p $out/bin
-    ln -s $out/${python.sitePackages}/kaleido/executable/bin/kaleido $out/bin/kaleido
+  postInstall =
+    ''
+      # Expose kaleido binary
+      mkdir -p $out/bin
+      ln -s $out/${python.sitePackages}/kaleido/executable/bin/kaleido $out/bin/kaleido
 
-    # Replace bundled swiftshader with libGL
-    rm -rf $out/${python.sitePackages}/kaleido/executable/bin/swiftshader
-    ln -s ${libGL}/lib $out/${python.sitePackages}/kaleido/executable/bin/swiftshader
+      # Relace bundled libraries with nixpkgs-packaged libraries
+      rm -rf $out/${python.sitePackages}/kaleido/executable/lib
+      mkdir -p $out/${python.sitePackages}/kaleido/executable/lib
+      ln -s ${expat}/lib/* $out/${python.sitePackages}/kaleido/executable/lib/
+      ln -s ${nspr}/lib/* $out/${python.sitePackages}/kaleido/executable/lib/
+      ln -s ${nss}/lib/* $out/${python.sitePackages}/kaleido/executable/lib/
+      ln -s ${sqlite}/lib/* $out/${python.sitePackages}/kaleido/executable/lib/
 
-    # Relace bundled libraries with nixpkgs-packaged libraries
-    rm -rf $out/${python.sitePackages}/kaleido/executable/lib
-    mkdir -p $out/${python.sitePackages}/kaleido/executable/lib
-    ln -s ${expat}/lib/* $out/${python.sitePackages}/kaleido/executable/lib/
-    ln -s ${nspr}/lib/* $out/${python.sitePackages}/kaleido/executable/lib/
-    ln -s ${nss}/lib/* $out/${python.sitePackages}/kaleido/executable/lib/
-    ln -s ${sqlite}/lib/* $out/${python.sitePackages}/kaleido/executable/lib/
+      # Replace bundled font configuration with nixpkgs-packaged font configuration
+      rm -rf $out/${python.sitePackages}/kaleido/executable/etc/fonts
+      mkdir -p $out/${python.sitePackages}/kaleido/executable/etc/fonts/conf.d
+      ln -s ${fontconfig.out}/etc/fonts/fonts.conf $out/${python.sitePackages}/kaleido/executable/etc/fonts/
+      ls -s ${fontconfig.out}/etc/fonts/conf.d/* $out/${python.sitePackages}/kaleido/executable/etc/fonts/conf.d/
+      ln -s ${sbclPackages.cl-dejavu}/dejavu-fonts-ttf-2.37/fontconfig/* $out/${python.sitePackages}/kaleido/executable/etc/fonts/conf.d/
 
-    # Replace bundled font configuration with nixpkgs-packaged font configuration
-    rm -rf $out/${python.sitePackages}/kaleido/executable/etc/fonts
-    mkdir -p $out/${python.sitePackages}/kaleido/executable/etc/fonts/conf.d
-    ln -s ${fontconfig.out}/etc/fonts/fonts.conf $out/${python.sitePackages}/kaleido/executable/etc/fonts/
-    ls -s ${fontconfig.out}/etc/fonts/conf.d/* $out/${python.sitePackages}/kaleido/executable/etc/fonts/conf.d/
-    ln -s ${sbclPackages.cl-dejavu}/dejavu-fonts-ttf-2.37/fontconfig/* $out/${python.sitePackages}/kaleido/executable/etc/fonts/conf.d/
-
-    # Replace bundled fonts with nixpkgs-packaged fonts
-    # Currently this causes an issue where the fonts aren't found. I'm not sure why, so I'm leaving this commented out for now.
-    #rm -rf $out/${python.sitePackages}/kaleido/executable/xdg/fonts
-    #mkdir -p $out/${python.sitePackages}/kaleido/executable/xdg/fonts/truetype/dejavu $out/${python.sitePackages}/kaleido/executable/xdg/fonts/truetype/lato
-    #ln -s ${dejavu_fonts}/share/fonts/truetype/* $out/${python.sitePackages}/kaleido/executable/xdg/fonts/truetype/dejavu/
-    #ln -s ${lato}/share/fonts/lato/* $out/${python.sitePackages}/kaleido/executable/xdg/fonts/truetype/lato/
-  '';
+      # Replace bundled fonts with nixpkgs-packaged fonts
+      # Currently this causes an issue where the fonts aren't found. I'm not sure why, so I'm leaving this commented out for now.
+      #rm -rf $out/${python.sitePackages}/kaleido/executable/xdg/fonts
+      #mkdir -p $out/${python.sitePackages}/kaleido/executable/xdg/fonts/truetype/dejavu $out/${python.sitePackages}/kaleido/executable/xdg/fonts/truetype/lato
+      #ln -s ${dejavu_fonts}/share/fonts/truetype/* $out/${python.sitePackages}/kaleido/executable/xdg/fonts/truetype/dejavu/
+      #ln -s ${lato}/share/fonts/lato/* $out/${python.sitePackages}/kaleido/executable/xdg/fonts/truetype/lato/
+    ''
+    + lib.optionalString (!stdenv.isDarwin) ''
+      # Replace bundled swiftshader with libGL
+      rm -rf $out/${python.sitePackages}/kaleido/executable/bin/swiftshader
+      ln -s ${libGL}/lib $out/${python.sitePackages}/kaleido/executable/bin/swiftshader
+    '';
 
   passthru.tests = lib.optionalAttrs (!stdenv.hostPlatform.isDarwin) {
     kaleido = callPackage ./tests.nix { };