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-rw-r--r--pkgs/development/ocaml-modules/curses/default.nix2
-rw-r--r--pkgs/development/ocaml-modules/eigen/default.nix2
-rw-r--r--pkgs/development/ocaml-modules/lablgtk/default.nix4
-rw-r--r--pkgs/development/ocaml-modules/num/default.nix2
4 files changed, 5 insertions, 5 deletions
diff --git a/pkgs/development/ocaml-modules/curses/default.nix b/pkgs/development/ocaml-modules/curses/default.nix
index 4c38d161ee61e..23c098aedcb5d 100644
--- a/pkgs/development/ocaml-modules/curses/default.nix
+++ b/pkgs/development/ocaml-modules/curses/default.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ ocaml findlib ];
 
   # Fix build for recent ncurses versions
-  NIX_CFLAGS_COMPILE = "-DNCURSES_INTERNALS=1";
+  env.NIX_CFLAGS_COMPILE = "-DNCURSES_INTERNALS=1";
 
   createFindlibDestdir = true;
 
diff --git a/pkgs/development/ocaml-modules/eigen/default.nix b/pkgs/development/ocaml-modules/eigen/default.nix
index 47b002fd7302f..16a69db3b2fce 100644
--- a/pkgs/development/ocaml-modules/eigen/default.nix
+++ b/pkgs/development/ocaml-modules/eigen/default.nix
@@ -15,7 +15,7 @@ buildDunePackage rec {
 
   minimumOCamlVersion = "4.02";
 
-  NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin "-I${lib.getDev libcxx}/include/c++/v1";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin "-I${lib.getDev libcxx}/include/c++/v1";
 
   propagatedBuildInputs = [ ctypes ];
 
diff --git a/pkgs/development/ocaml-modules/lablgtk/default.nix b/pkgs/development/ocaml-modules/lablgtk/default.nix
index 96dbd071fdefe..4f6a5be39fb71 100644
--- a/pkgs/development/ocaml-modules/lablgtk/default.nix
+++ b/pkgs/development/ocaml-modules/lablgtk/default.nix
@@ -12,7 +12,7 @@ let param =
       rev = version;
       sha256 = "sha256-69Svno0qLaUifMscnVuPUJlCo9d8Lee+1qiYx34G3Po=";
     };
-    NIX_CFLAGS_COMPILE = null;
+    env.NIX_CFLAGS_COMPILE = null;
     buildInputs = [ camlp-streams ];
   } else if check "3.12" then {
     version = "2.18.5";
@@ -24,7 +24,7 @@ let param =
     # gcc-10. Otherwise build fails as:
     #   ld: ml_gtktree.o:(.bss+0x0): multiple definition of
     #     `ml_table_extension_events'; ml_gdkpixbuf.o:(.bss+0x0): first defined here
-    NIX_CFLAGS_COMPILE = "-fcommon";
+    env.NIX_CFLAGS_COMPILE = "-fcommon";
   } else throw "lablgtk is not available for OCaml ${ocaml.version}";
 in
 
diff --git a/pkgs/development/ocaml-modules/num/default.nix b/pkgs/development/ocaml-modules/num/default.nix
index 023b327cc08eb..12f9aa4ca02b7 100644
--- a/pkgs/development/ocaml-modules/num/default.nix
+++ b/pkgs/development/ocaml-modules/num/default.nix
@@ -29,6 +29,6 @@ stdenv.mkDerivation (rec {
     inherit (src.meta) homepage;
   };
 } // (if lib.versions.majorMinor ocaml.version == "4.06" then {
-    NIX_CFLAGS_COMPILE = "-fcommon";
+    env.NIX_CFLAGS_COMPILE = "-fcommon";
   } else {})
 )