diff --git a/pkgs/development/python-modules/fx2/default.nix b/pkgs/development/python-modules/fx2/default.nix
index acbaf93a4ead..bcc7a4b5c988 100644
--- a/pkgs/development/python-modules/fx2/default.nix
+++ b/pkgs/development/python-modules/fx2/default.nix
@@ -7,15 +7,15 @@
 , crcmod
 }:
 
-buildPythonPackage {
+buildPythonPackage rec {
   pname = "fx2";
-  version = "unstable-2020-01-25";
+  version = "0.9";
 
   src = fetchFromGitHub {
     owner = "whitequark";
     repo = "libfx2";
-    rev = "d3e37f640d706aac5e69ae4476f6cd1bd0cd6a4e";
-    sha256 = "1dsyknjpgf4wjkfr64lln1lcy7qpxdx5x3qglidrcswzv9b3i4fg";
+    rev = version;
+    sha256 = "sha256-Uk+K7ym92JX4fC3PyTNxd0UvBzoNZmtbscBYjSWChuk=";
   };
 
   nativeBuildInputs = [ sdcc ];
diff --git a/pkgs/development/python-modules/glasgow/default.nix b/pkgs/development/python-modules/glasgow/default.nix
index 6a32364fdf31..8a63f78728e2 100644
--- a/pkgs/development/python-modules/glasgow/default.nix
+++ b/pkgs/development/python-modules/glasgow/default.nix
@@ -18,15 +18,15 @@
 
 buildPythonPackage rec {
   pname = "glasgow";
-  version = "unstable-2020-02-08";
+  version = "unstable-2020-06-29";
   # python software/setup.py --version
   realVersion = "0.1.dev1352+g${lib.substring 0 7 src.rev}";
 
   src = fetchFromGitHub {
     owner = "GlasgowEmbedded";
     repo = "glasgow";
-    rev = "2a8bfc981b90ba5d86c310911dbd6ffe71acd498";
-    sha256 = "01v5269bv09ggvmq6lqyhr5am51hzmwya1p5n62h84b7rdwd8q9m";
+    rev = "f885790d7927b893e631c33744622d6ebc18b5e3";
+    sha256 = "sha256-fSorSEa5K09aPEOk4XPWOFRxYl1KGVy29jOBqIvs2hk=";
   };
 
   nativeBuildInputs = [ setuptools_scm sdcc ];