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-rw-r--r--pkgs/development/libraries/science/biology/htslib/default.nix4
-rw-r--r--pkgs/development/libraries/science/math/arpack/default.nix4
-rw-r--r--pkgs/development/libraries/science/math/scalapack/default.nix2
3 files changed, 5 insertions, 5 deletions
diff --git a/pkgs/development/libraries/science/biology/htslib/default.nix b/pkgs/development/libraries/science/biology/htslib/default.nix
index 7d771414fb01..cdd56731fa0e 100644
--- a/pkgs/development/libraries/science/biology/htslib/default.nix
+++ b/pkgs/development/libraries/science/biology/htslib/default.nix
@@ -2,11 +2,11 @@
 
 stdenv.mkDerivation rec {
   pname = "htslib";
-  version = "1.9";
+  version = "1.10.2";
 
   src = fetchurl {
     url = "https://github.com/samtools/htslib/releases/download/${version}/${pname}-${version}.tar.bz2";
-    sha256 = "16ljv43sc3fxmv63w7b2ff8m1s7h89xhazwmbm1bicz8axq8fjz0";
+    sha256 = "0f8rglbvf4aaw41i2sxlpq7pvhly93sjqiz0l4q3hwki5zg47dg3";
   };
 
   # perl is only used during the check phase.
diff --git a/pkgs/development/libraries/science/math/arpack/default.nix b/pkgs/development/libraries/science/math/arpack/default.nix
index 36576de05631..89f3aa94247b 100644
--- a/pkgs/development/libraries/science/math/arpack/default.nix
+++ b/pkgs/development/libraries/science/math/arpack/default.nix
@@ -30,9 +30,9 @@ stdenv.mkDerivation {
   ];
 
   preCheck = if stdenv.isDarwin then ''
-    export DYLD_LIBRARY_PATH=$DYLD_LIBRARY_PATH:`pwd`/lib
+    export DYLD_LIBRARY_PATH=$DYLD_LIBRARY_PATH''${DYLD_LIBRARY_PATH:+:}`pwd`/lib
   '' else ''
-    export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:`pwd`/lib
+    export LD_LIBRARY_PATH=$LD_LIBRARY_PATH''${LD_LIBRARY_PATH:+:}`pwd`/lib
   '' + ''
     # Prevent tests from using all cores
     export OMP_NUM_THREADS=2
diff --git a/pkgs/development/libraries/science/math/scalapack/default.nix b/pkgs/development/libraries/science/math/scalapack/default.nix
index bff0d9a85fa2..fda902f320c9 100644
--- a/pkgs/development/libraries/science/math/scalapack/default.nix
+++ b/pkgs/development/libraries/science/math/scalapack/default.nix
@@ -40,7 +40,7 @@ stdenv.mkDerivation rec {
     # Run single threaded
     export OMP_NUM_THREADS=1
 
-    export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:`pwd`/lib
+    export LD_LIBRARY_PATH=$LD_LIBRARY_PATH''${LD_LIBRARY_PATH:+:}`pwd`/lib
   '';
 
   meta = with stdenv.lib; {