diff --git a/pkgs/by-name/pr/proj/package.nix b/pkgs/by-name/pr/proj/package.nix
index cd72a4a99b79..51c90fd831d8 100644
--- a/pkgs/by-name/pr/proj/package.nix
+++ b/pkgs/by-name/pr/proj/package.nix
@@ -13,11 +13,14 @@
   nlohmann_json,
   python3,
   cacert,
+  writableTmpDirAsHomeHook,
 }:
 
 stdenv.mkDerivation (finalAttrs: {
   pname = "proj";
   version = "9.8.1";
+  __structuredAttrs = true;
+  strictDeps = true;
 
   src = fetchFromGitHub {
     owner = "OSGeo";
@@ -50,6 +53,10 @@ stdenv.mkDerivation (finalAttrs: {
 
   nativeCheckInputs = [
     cacert
+    sqlite
+    writableTmpDirAsHomeHook
+  ];
+  checkInputs = [
     gtest
   ];
 
@@ -57,13 +64,7 @@ stdenv.mkDerivation (finalAttrs: {
     "-DUSE_EXTERNAL_GTEST=ON"
     "-DRUN_NETWORK_DEPENDENT_TESTS=OFF"
     "-DNLOHMANN_JSON_ORIGIN=external"
-    "-DEXE_SQLITE3=${buildPackages.sqlite}/bin/sqlite3"
-  ];
-
-  env.CXXFLAGS = toString [
-    # GCC 13: error: 'int64_t' in namespace 'std' does not name a type
-    "-include"
-    "cstdint"
+    "-DEXE_SQLITE3=${lib.getExe buildPackages.sqlite}"
   ];
 
   preCheck =
@@ -71,7 +72,6 @@ stdenv.mkDerivation (finalAttrs: {
       libPathEnvVar = if stdenv.hostPlatform.isDarwin then "DYLD_LIBRARY_PATH" else "LD_LIBRARY_PATH";
     in
     ''
-      export HOME=$TMPDIR
       export TMP=$TMPDIR
       export ${libPathEnvVar}=$PWD/lib
     '';