diff --git a/pkgs/development/embedded/fpga/apio/default.nix b/pkgs/development/embedded/fpga/apio/default.nix
index 47ff562958ec..ef153b96ca49 100644
--- a/pkgs/development/embedded/fpga/apio/default.nix
+++ b/pkgs/development/embedded/fpga/apio/default.nix
@@ -16,26 +16,27 @@
 
 buildPythonApplication rec {
   pname = "apio";
-  version = "0.8.1";
-  format = "pyproject";
+  version = "0.9.5";
+
+  pyproject = true;
 
   src = fetchFromGitHub {
     owner = "FPGAwars";
     repo = "apio";
     rev = "v${version}";
-    sha256 = "sha256-04qAGTzusMT3GsaRxDoXNJK1Mslzxu+ugQclBJx8xzE=";
+    hash = "sha256-VU4tOszGkw20DWW2SerFsnjFiSkrSwqBcwosGnHJfU8=";
   };
 
   postPatch = ''
     substituteInPlace pyproject.toml \
-      --replace 'scons==4.2.0' 'scons' \
-      --replace '==' '>='
+      --replace-fail 'scons==4.2.0' 'scons' \
+      --replace-fail '==' '>='
 
-    substituteInPlace apio/managers/scons.py --replace \
+    substituteInPlace apio/managers/scons.py --replace-fail \
       'return "tinyprog --libusb --program"' \
       'return "${tinyprog}/bin/tinyprog --libusb --program"'
-    substituteInPlace apio/util.py --replace \
-      '_command = join(get_bin_dir(), "tinyprog")' \
+    substituteInPlace apio/util.py --replace-fail \
+      '_command = apio_bin_dir / "tinyprog"' \
       '_command = "${tinyprog}/bin/tinyprog"'
 
     # semantic-version seems to not support version numbers like the one of tinyprog in Nixpkgs (1.0.24.dev114+gxxxxxxx).
@@ -43,7 +44,7 @@ buildPythonApplication rec {
     # This leads to an error like "Error: Invalid version string: '1.0.24.dev114+g97f6353'"
     # when executing "apio upload" for a TinyFPGA.
     # Replace the dot with a dash to work around this problem.
-    substituteInPlace apio/managers/scons.py --replace \
+    substituteInPlace apio/managers/scons.py --replace-fail \
         'version = semantic_version.Version(pkg_version)' \
         'version = semantic_version.Version(pkg_version.replace(".dev", "-dev"))'
   '';
@@ -69,8 +70,15 @@ buildPythonApplication rec {
     pytestCheckHook
   ];
 
+  disabledTestPaths = [
+    # This test fails and is also not executed in upstream's CI
+    "test2"
+  ];
+
   pytestFlagsArray = [ "--offline" ];
 
+  strictDeps = true;
+
   meta = with lib; {
     description = "Open source ecosystem for open FPGA boards";
     mainProgram = "apio";