soapyplutosdr: backport cmake < 3.5.0 fix

pkgs/by-name/so/soapyplutosdr/package.nix

@@ -2,6 +2,7 @@
   lib,
   stdenv,
   fetchFromGitHub,
+  fetchpatch,
   cmake,
   pkg-config,
   libad9361,
@@ -32,6 +33,18 @@ stdenv.mkDerivation (finalAttrs: {
     soapysdr
   ];
 
+  patches = [
+    # CMake < 3.5.0 fixes. Remove as soon as https://github.com/pothosware/SoapyPlutoSDR/pull/72 is merged and we do the next version bump.
+    (fetchpatch {
+      url = "https://github.com/pothosware/SoapyPlutoSDR/commit/6ab50457c378e19fa53038cadb131313cde23916.patch";
+      hash = "sha256-ExrcziyDmytaVosQ+em177Unh6er/2+2nLjEXg6f0vU=";
+    })
+    (fetchpatch {
+      url = "https://github.com/pothosware/SoapyPlutoSDR/commit/4a01ddf1ae2fd0de86c6774ff35aa51f9b4f0b5a.patch";
+      hash = "sha256-XgyCWSAlKqCXxH5vtijYqub6656xYkWaY6+B0dkfsGA=";
+    })
+  ];
+
   cmakeFlags = [ "-DSoapySDR_DIR=${soapysdr}/share/cmake/SoapySDR/" ];
 
   meta = with lib; {