diff --git a/pkgs/development/libraries/proj/7.nix b/pkgs/development/libraries/proj/7.nix
new file mode 100644
index 000000000000..3eb4789939ff
--- /dev/null
+++ b/pkgs/development/libraries/proj/7.nix
@@ -0,0 +1,58 @@
+{ lib
+, stdenv
+, fetchFromGitHub
+, cmake
+, pkg-config
+, sqlite
+, libtiff
+, curl
+, gtest
+, fetchpatch
+}:
+
+stdenv.mkDerivation rec {
+  pname = "proj";
+  version = "7.2.1";
+
+  src = fetchFromGitHub {
+    owner = "OSGeo";
+    repo = "PROJ";
+    rev = version;
+    sha256 = "0mymvfvs8xggl4axvlj7kc1ksd9g94kaz6w1vdv0x2y5mqk93gx9";
+  };
+
+  patches = [
+    (fetchpatch { # https://github.com/OSGeo/PROJ/issues/2557
+      name = "gie_self_tests-fail.diff"; # included in >= 8.0.1
+      url = "https://github.com/OSGeo/PROJ/commit/6f1a3c4648bf06862dca0b3725cbb3b7ee0284e3.diff";
+      sha256 = "0gapny0a9c3r0x9szjgn86sspjrrf4vwbija77b17w6ci5cq4pdf";
+    })
+  ];
+
+  postPatch = lib.optionalString (version == "7.2.1") ''
+    substituteInPlace CMakeLists.txt \
+      --replace "MAJOR 7 MINOR 2 PATCH 0" "MAJOR 7 MINOR 2 PATCH 1"
+  '';
+
+  outputs = [ "out" "dev"];
+
+  nativeBuildInputs = [ cmake pkg-config ];
+
+  buildInputs = [ sqlite libtiff curl ];
+
+  checkInputs = [ gtest ];
+
+  cmakeFlags = [
+    "-DUSE_EXTERNAL_GTEST=ON"
+  ];
+
+  doCheck = true;
+
+  meta = with lib; {
+    description = "Cartographic Projections Library";
+    homepage = "https://proj4.org";
+    license = licenses.mit;
+    platforms = platforms.unix;
+    maintainers = with maintainers; [ vbgl dotlambda ];
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index ffec1ea5c52f..432256aaeade 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -18545,6 +18545,8 @@ with pkgs;
 
   proj = callPackage ../development/libraries/proj { };
 
+  proj_7 = callPackage ../development/libraries/proj/7.nix { };
+
   proj-datumgrid = callPackage ../development/libraries/proj-datumgrid { };
 
   proselint = callPackage ../tools/text/proselint {