diff --git a/pkgs/development/libraries/science/math/clblas/default.nix b/pkgs/development/libraries/science/math/clblas/default.nix
index aca395001f9..fcb49d70a3b 100644
--- a/pkgs/development/libraries/science/math/clblas/default.nix
+++ b/pkgs/development/libraries/science/math/clblas/default.nix
@@ -4,7 +4,7 @@
 , gfortran
 , blas
 , boost
-, python
+, python3
 , ocl-icd
 , opencl-headers
 , Accelerate, CoreGraphics, CoreVideo, OpenCL
@@ -39,7 +39,7 @@ stdenv.mkDerivation rec {
   buildInputs = [
     gfortran
     blas
-    python
+    python3
     boost
   ] ++ lib.optionals (!stdenv.isDarwin) [
     ocl-icd
@@ -53,6 +53,8 @@ stdenv.mkDerivation rec {
     OpenCL
   ];
 
+  strictDeps = true;
+
   meta = with lib; {
     homepage = "https://github.com/clMathLibraries/clBLAS";
     description = "A software library containing BLAS functions written in OpenCL";