diff --git a/pkgs/applications/misc/gnss-sdr/default.nix b/pkgs/applications/misc/gnss-sdr/default.nix
index 0bb0926f048..6cbdea8c686 100644
--- a/pkgs/applications/misc/gnss-sdr/default.nix
+++ b/pkgs/applications/misc/gnss-sdr/default.nix
@@ -47,6 +47,7 @@ stdenv.mkDerivation rec {
   cmakeFlags = [
     "-DGFlags_ROOT_DIR=${google-gflags}/lib"
     "-DGLOG_INCLUDE_DIR=${glog}/include"
+    "-DENABLE_UNIT_TESTING=OFF"
 
     # gnss-sdr doesn't truly depend on BLAS or LAPACK, as long as
     # armadillo is built using both, so skip checking for them.
diff --git a/pkgs/development/libraries/armadillo/default.nix b/pkgs/development/libraries/armadillo/default.nix
index 16ba6b32382..7685a0d9eb4 100644
--- a/pkgs/development/libraries/armadillo/default.nix
+++ b/pkgs/development/libraries/armadillo/default.nix
@@ -1,12 +1,12 @@
 { stdenv, fetchurl, cmake, openblasCompat, superlu, hdf5 }:
 
 stdenv.mkDerivation rec {
-  version = "9.100.5";
+  version = "9.200.4";
   name = "armadillo-${version}";
 
   src = fetchurl {
     url = "mirror://sourceforge/arma/armadillo-${version}.tar.xz";
-    sha256 = "1ka1vd9fcmvp12qkcm4888dkfqwnalvv00x04wy29f3nx3qwczby";
+    sha256 = "0rkry405vacvlvkc7xdkzh20zf7yni9hsp65v0dby91na0wcrl8h";
   };
 
   nativeBuildInputs = [ cmake ];