3 files changed, 3 insertions, 3 deletions
diff --git a/pkgs/applications/science/math/calculix/default.nix b/pkgs/applications/science/math/calculix/default.nix
index 4b0ae6f8ac9..2d2fb0a92d9 100644
--- a/pkgs/applications/science/math/calculix/default.nix
+++ b/pkgs/applications/science/math/calculix/default.nix
@@ -17,7 +17,7 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ arpack spooles blas lapack ];
 
-  NIX_CFLAGS_COMPILE = [
+  NIX_CFLAGS_COMPILE = toString [
     "-I${spooles}/include/spooles"
     "-std=legacy"
   ];
diff --git a/pkgs/applications/science/math/mxnet/default.nix b/pkgs/applications/science/math/mxnet/default.nix
index 021593124a3..3f0c5511c20 100644
--- a/pkgs/applications/science/math/mxnet/default.nix
+++ b/pkgs/applications/science/math/mxnet/default.nix
@@ -54,7 +54,7 @@ stdenv.mkDerivation rec {
     ] else [ "-DUSE_CUDA=OFF" ])
     ++ lib.optional (!cudnnSupport) "-DUSE_CUDNN=OFF";
 
-  NIX_CFLAGS_COMPILE = [
+  NIX_CFLAGS_COMPILE = toString [
     # Needed with GCC 12
     "-Wno-error=maybe-uninitialized"
     "-Wno-error=uninitialized"
diff --git a/pkgs/applications/science/math/perseus/default.nix b/pkgs/applications/science/math/perseus/default.nix
index d9921e68edb..d0a9298cebd 100644
--- a/pkgs/applications/science/math/perseus/default.nix
+++ b/pkgs/applications/science/math/perseus/default.nix
@@ -13,7 +13,7 @@ stdenv.mkDerivation {
   };
 
   sourceRoot = ".";
-  NIX_CFLAGS_COMPILE = [ "-std=c++14" ];
+  NIX_CFLAGS_COMPILE = toString [ "-std=c++14" ];
   buildPhase = ''
     g++ Pers.cpp -O3 -fpermissive -o perseus
   '';