diff --git a/pkgs/build-support/alternatives/blas/default.nix b/pkgs/build-support/alternatives/blas/default.nix
index 9e1aacfaf823..5ebbc737e11a 100644
--- a/pkgs/build-support/alternatives/blas/default.nix
+++ b/pkgs/build-support/alternatives/blas/default.nix
@@ -70,7 +70,7 @@ stdenv.mkDerivation {
     exit 1
   fi
 
-  nm -an "$libblas" | cut -f3 -d' ' > symbols
+  $NM -an "$libblas" | cut -f3 -d' ' > symbols
   for symbol in ${toString blasFortranSymbols}; do
     grep -q "^$symbol_$" symbols || { echo "$symbol" was not found in "$libblas"; exit 1; }
   done
diff --git a/pkgs/build-support/cc-wrapper/default.nix b/pkgs/build-support/cc-wrapper/default.nix
index 4f3680f2197c..6ee287e287bc 100644
--- a/pkgs/build-support/cc-wrapper/default.nix
+++ b/pkgs/build-support/cc-wrapper/default.nix
@@ -209,6 +209,7 @@ stdenv.mkDerivation {
       wrap ${targetPrefix}gfortran $wrapper $ccPath/${targetPrefix}gfortran
       ln -sv ${targetPrefix}gfortran $out/bin/${targetPrefix}g77
       ln -sv ${targetPrefix}gfortran $out/bin/${targetPrefix}f77
+      export named_fc=${targetPrefix}gfortran
     ''
 
     + optionalString cc.langJava or false ''
@@ -227,8 +228,8 @@ stdenv.mkDerivation {
 
   setupHooks = [
     ../setup-hooks/role.bash
-    ./setup-hook.sh
-  ];
+  ] ++ stdenv.lib.optional (cc.langC or true) ./setup-hook.sh
+    ++ stdenv.lib.optional (cc.langFortran or false) ./fortran-hook.sh;
 
   postFixup =
     # Ensure flags files exists, as some other programs cat them. (That these
diff --git a/pkgs/build-support/cc-wrapper/fortran-hook.sh b/pkgs/build-support/cc-wrapper/fortran-hook.sh
new file mode 100644
index 000000000000..d72f314c01ce
--- /dev/null
+++ b/pkgs/build-support/cc-wrapper/fortran-hook.sh
@@ -0,0 +1,11 @@
+getTargetRole
+getTargetRoleWrapper
+
+export FC${role_post}=@named_fc@
+
+# If unset, assume the default hardening flags.
+# These are different for fortran.
+: ${NIX_HARDENING_ENABLE="stackprotector pic strictoverflow relro bindnow"}
+export NIX_HARDENING_ENABLE
+
+unset -v role_post
diff --git a/pkgs/development/libraries/science/math/arpack/default.nix b/pkgs/development/libraries/science/math/arpack/default.nix
index 0829557d0f3d..02d51f0c419b 100644
--- a/pkgs/development/libraries/science/math/arpack/default.nix
+++ b/pkgs/development/libraries/science/math/arpack/default.nix
@@ -31,7 +31,7 @@ stdenv.mkDerivation {
   ];
 
   preCheck = if stdenv.isDarwin then ''
-    export DYLD_LIBRARY_PATH=$DYLD_LIBRARY_PATH''${DYLD_LIBRARY_PATH:+:}`pwd`/lib
+    export DYLD_LIBRARY_PATH=$DYLD_LIBRARY_PATH''${DYLD_LIBRARY_PATH:+:}`pwd`/lib:${blas}/lib:${lapack}/lib
   '' else ''
     export LD_LIBRARY_PATH=$LD_LIBRARY_PATH''${LD_LIBRARY_PATH:+:}`pwd`/lib
   '' + ''