diff --git a/pkgs/development/gnuradio-modules/limesdr/default.nix b/pkgs/development/gnuradio-modules/limesdr/default.nix
index f26e4695a10c..48bbc68c80a3 100644
--- a/pkgs/development/gnuradio-modules/limesdr/default.nix
+++ b/pkgs/development/gnuradio-modules/limesdr/default.nix
@@ -20,7 +20,6 @@ let
   version = {
     "3.7" = "2.0.0";
     "3.8" = "3.0.1";
-    "3.9" = null;
   }.${gnuradio.versionAttr.major};
   src = fetchFromGitHub {
     owner = "myriadrf";
@@ -29,7 +28,6 @@ let
     sha256 = {
       "3.7" = "0ldqvfwl0gil89l9s31fjf9d7ki0dk572i8vna336igfaz348ypq";
       "3.8" = "ffs+8TU0yr6IW1xZJ/abQ1CQWGZM+zYqPRJxy3ZvM9U=";
-      "3.9" = null;
     }.${gnuradio.versionAttr.major};
   };
 in mkDerivation {
diff --git a/pkgs/development/gnuradio-modules/osmosdr/default.nix b/pkgs/development/gnuradio-modules/osmosdr/default.nix
index ebb34afee101..15b494b784b2 100644
--- a/pkgs/development/gnuradio-modules/osmosdr/default.nix
+++ b/pkgs/development/gnuradio-modules/osmosdr/default.nix
@@ -25,7 +25,6 @@ let
   version = {
     "3.7" = "0.1.5";
     "3.8" = "0.2.2";
-    "3.9" = null;
   }.${gnuradio.versionAttr.major};
   src = fetchgit {
     url = "git://git.osmocom.org/gr-osmosdr";
@@ -33,7 +32,6 @@ let
     sha256 = {
       "3.7" = "0bf9bnc1c3c4yqqqgmg3nhygj6rcfmyk6pybi27f7461d2cw1drv";
       "3.8" = "HT6xlN6cJAnvF+s1g2I1uENhBJJizdADlLXeSD0rEqs=";
-      "3.9" = null;
     }.${gnuradio.versionAttr.major};
   };
 in mkDerivation {