2 files changed, 4 insertions, 4 deletions
diff --git a/pkgs/build-support/alternatives/blas/default.nix b/pkgs/build-support/alternatives/blas/default.nix
index 8bba49b45504..bdee6688a740 100644
--- a/pkgs/build-support/alternatives/blas/default.nix
+++ b/pkgs/build-support/alternatives/blas/default.nix
@@ -63,7 +63,7 @@ stdenv.mkDerivation {
   installPhase = (''
   mkdir -p $out/lib $dev/include $dev/lib/pkgconfig
 
-  libblas="${lib.getLib blasProvider}/lib/libblas${stdenv.hostPlatform.extensions.sharedLibrary}"
+  libblas="${lib.getLib blasProvider}/lib/libblas${canonicalExtension}"
 
   if ! [ -e "$libblas" ]; then
     echo "$libblas does not exist, ${blasProvider.name} does not provide libblas."
@@ -100,7 +100,7 @@ Libs: -L$out/lib -lblas
 Cflags: -I$dev/include
 EOF
 
-  libcblas="${lib.getLib blasProvider}/lib/libcblas${stdenv.hostPlatform.extensions.sharedLibrary}"
+  libcblas="${lib.getLib blasProvider}/lib/libcblas${canonicalExtension}"
 
   if ! [ -e "$libcblas" ]; then
     echo "$libcblas does not exist, ${blasProvider.name} does not provide libcblas."
diff --git a/pkgs/build-support/alternatives/lapack/default.nix b/pkgs/build-support/alternatives/lapack/default.nix
index e260ad1bd931..5a19916f83e4 100644
--- a/pkgs/build-support/alternatives/lapack/default.nix
+++ b/pkgs/build-support/alternatives/lapack/default.nix
@@ -41,7 +41,7 @@ stdenv.mkDerivation {
   installPhase = (''
   mkdir -p $out/lib $dev/include $dev/lib/pkgconfig
 
-  liblapack="${lib.getLib lapackProvider}/lib/liblapack${stdenv.hostPlatform.extensions.sharedLibrary}"
+  liblapack="${lib.getLib lapackProvider}/lib/liblapack${canonicalExtension}"
 
   if ! [ -e "$liblapack" ]; then
     echo "$liblapack does not exist, ${lapackProvider.name} does not provide liblapack."
@@ -74,7 +74,7 @@ Cflags: -I$dev/include
 Libs: -L$out/lib -llapack
 EOF
 
-  liblapacke="${lib.getLib lapackProvider}/lib/liblapacke${stdenv.hostPlatform.extensions.sharedLibrary}"
+  liblapacke="${lib.getLib lapackProvider}/lib/liblapacke${canonicalExtension}"
 
   if ! [ -e "$liblapacke" ]; then
     echo "$liblapacke does not exist, ${lapackProvider.name} does not provide liblapacke."