diff --git a/pkgs/development/compilers/julia/0.3.nix b/pkgs/development/compilers/julia/0.3.nix
index 7f0f263283d8..82b35e2b9b36 100644
--- a/pkgs/development/compilers/julia/0.3.nix
+++ b/pkgs/development/compilers/julia/0.3.nix
@@ -5,11 +5,22 @@
 , libunwind, llvm, readline, utf8proc, zlib
 # standard library dependencies
 , double_conversion, fftwSinglePrec, fftw, glpk, gmp, mpfr, pcre
+# linear algebra
 , openblas, arpack, suitesparse
 }:
 
 with stdenv.lib;
 
+# All dependencies should use the same OpenBLAS.
+let
+  arpack_ = arpack;
+  suitesparse_ = suitesparse;
+in
+let
+  arpack = arpack_.override { inherit openblas; };
+  suitesparse = suitesparse_.override { inherit openblas; };
+in
+
 stdenv.mkDerivation rec {
   pname = "julia";
   version = "0.3.11";
diff --git a/pkgs/development/libraries/science/math/arpack/default.nix b/pkgs/development/libraries/science/math/arpack/default.nix
index c896ecca4728..58326a6fa503 100644
--- a/pkgs/development/libraries/science/math/arpack/default.nix
+++ b/pkgs/development/libraries/science/math/arpack/default.nix
@@ -23,10 +23,10 @@ stdenv.mkDerivation {
   FFLAGS = optional openblas.blas64 "-fdefault-integer-8";
 
   meta = {
-    homepage = "http://forge.scilab.org/index.php/p/arpack-ng/";
+    homepage = "http://github.com/opencollab/arpack-ng";
     description = ''
       A collection of Fortran77 subroutines to solve large scale eigenvalue
-      problems
+      problems.
     '';
     license = stdenv.lib.licenses.bsd3;
     maintainers = [ stdenv.lib.maintainers.ttuegel ];