diff --git a/srcpkgs/Uranium/patches/0002-Fix-install-prefix-symlink.patch b/srcpkgs/Uranium/patches/0002-Fix-install-prefix-symlink.patch
new file mode 100644
index 00000000000..101d8ef90be
--- /dev/null
+++ b/srcpkgs/Uranium/patches/0002-Fix-install-prefix-symlink.patch
@@ -0,0 +1,30 @@
+From 237dc959ca536ae4a45d1ba59d4ad6cf86a36946 Mon Sep 17 00:00:00 2001
+From: Ghostkeeper <rubend@tutanota.com>
+Date: Mon, 25 Feb 2019 11:58:02 +0100
+Subject: [PATCH] Fix install prefix when installing in symlinked directory
+
+If /bin is a symlink to /usr/bin and /bin appears before /usr/bin on the user's PATH, it would get sys.argv[0]='/bin/python3'. This then messes up the install location ('/') which consequently messes up the data and config storage directories.
+This solution is provided by CapnKernel and should resolve the symlink so that sys.argv[0]='/usr/bin/python3' again and the storage data and config storage directories become something like /usr/share/... again.
+---
+ UM/Application.py | 5 +++--
+ 1 file changed, 3 insertions(+), 2 deletions(-)
+
+diff --git UM/Application.py UM/Application.py
+index 05adb8f3..f709438a 100644
+--- UM/Application.py
++++ UM/Application.py
+@@ -398,9 +398,10 @@ class Application:
+     @staticmethod
+     def getInstallPrefix() -> str:
+         if "python" in os.path.basename(sys.executable):
+-            return os.path.abspath(os.path.join(os.path.dirname(sys.argv[0]), ".."))
++            executable = sys.argv[0]
+         else:
+-            return os.path.abspath(os.path.join(os.path.dirname(sys.executable), ".."))
++            executable = sys.executable
++        return os.path.abspath(os.path.join(os.path.dirname(os.path.realpath(executable)), ".."))
+ 
+     __instance = None   # type: Application
+ 
+-- 
+2.21.0
diff --git a/srcpkgs/Uranium/template b/srcpkgs/Uranium/template
index 1d237f5dc51..6f31c47ce79 100644
--- a/srcpkgs/Uranium/template
+++ b/srcpkgs/Uranium/template
@@ -1,7 +1,7 @@
 # Template file for 'Uranium'
 pkgname=Uranium
-version=3.6.0
-revision=2
+version=4.0.0
+revision=1
 archs=noarch
 build_style=cmake
 pycompile_module="UM"
@@ -15,4 +15,4 @@ maintainer="Karl Nilsson <karl.robert.nilsson@gmail.com>"
 license="LGPL-3.0-or-later"
 homepage="https://github.com/Ultimaker/Uranium"
 distfiles="https://github.com/Ultimaker/Uranium/archive/${version}.tar.gz"
-checksum=9a63e7d02c57a818815f61ada53b41d6c04683f874db80baa32f68d34b51a245
+checksum=d405183b98b2e8db8c8c11ebe6f8838865cb4ac7f6a55ab0ac654b060edf9dd8