diff --git a/pkgs/applications/networking/instant-messengers/slack/default.nix b/pkgs/applications/networking/instant-messengers/slack/default.nix
index 15943d34e426..39cff6de85de 100644
--- a/pkgs/applications/networking/instant-messengers/slack/default.nix
+++ b/pkgs/applications/networking/instant-messengers/slack/default.nix
@@ -1,4 +1,5 @@
-{ lib, stdenv
+{ lib
+, stdenv
 , fetchurl
 , dpkg
 , undmg
@@ -19,6 +20,7 @@
 , glib
 , gnome2
 , gtk3
+, libGL
 , libappindicator-gtk3
 , libdrm
 , libnotify
@@ -53,18 +55,20 @@ let
     x86_64-linux = x86_64-linux-version;
   }.${system} or throwSystem;
 
-  src = let
-    base = "https://downloads.slack-edge.com";
-  in {
-    x86_64-darwin = fetchurl {
-      url = "${base}/releases/macos/${version}/prod/x64/Slack-${version}-macOS.dmg";
-      sha256 = x86_64-darwin-sha256;
-    };
-    x86_64-linux = fetchurl {
-      url = "${base}/linux_releases/slack-desktop-${version}-amd64.deb";
-      sha256 = x86_64-linux-sha256;
-    };
-  }.${system} or throwSystem;
+  src =
+    let
+      base = "https://downloads.slack-edge.com";
+    in
+      {
+        x86_64-darwin = fetchurl {
+          url = "${base}/releases/macos/${version}/prod/x64/Slack-${version}-macOS.dmg";
+          sha256 = x86_64-darwin-sha256;
+        };
+        x86_64-linux = fetchurl {
+          url = "${base}/linux_releases/slack-desktop-${version}-amd64.deb";
+          sha256 = x86_64-linux-sha256;
+        };
+      }.${system} or throwSystem;
 
   meta = with lib; {
     description = "Desktop client for Slack";
@@ -95,6 +99,7 @@ let
       glib
       gnome2.GConf
       gtk3
+      libGL
       libappindicator-gtk3
       libdrm
       libnotify
@@ -118,13 +123,13 @@ let
       xorg.libXi
       xorg.libXrandr
       xorg.libXrender
-      xorg.libxshmfence
       xorg.libXtst
       xorg.libxkbfile
+      xorg.libxshmfence
     ] + ":${stdenv.cc.cc.lib}/lib64";
 
     buildInputs = [
-      gtk3  # needed for GSETTINGS_SCHEMAS_PATH
+      gtk3 # needed for GSETTINGS_SCHEMAS_PATH
     ];
 
     nativeBuildInputs = [ dpkg makeWrapper nodePackages.asar ];
@@ -153,7 +158,7 @@ let
       rm $out/bin/slack
       makeWrapper $out/lib/slack/slack $out/bin/slack \
         --prefix XDG_DATA_DIRS : $GSETTINGS_SCHEMAS_PATH \
-        --prefix PATH : ${xdg-utils}/bin
+        --prefix PATH : ${lib.makeBinPath [xdg-utils]}
 
       # Fix the desktop link
       substituteInPlace $out/share/applications/slack.desktop \
@@ -177,6 +182,7 @@ let
       /usr/bin/defaults write com.tinyspeck.slackmacgap SlackNoAutoUpdates -bool YES
     '';
   };
-in if stdenv.isDarwin
-  then darwin
-  else linux
+in
+if stdenv.isDarwin
+then darwin
+else linux