6 files changed, 8 insertions, 11 deletions
diff --git a/pkgs/development/compilers/chez/default.nix b/pkgs/development/compilers/chez/default.nix
index a0fc30c8586..c0fd742082f 100644
--- a/pkgs/development/compilers/chez/default.nix
+++ b/pkgs/development/compilers/chez/default.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
 
   enableParallelBuilding = true;
 
-  NIX_CFLAGS_COMPILE = stdenv.lib.optional stdenv.cc.isGNU "-Wno-error=format-truncation";
+  NIX_CFLAGS_COMPILE = stdenv.lib.optionalString stdenv.cc.isGNU "-Wno-error=format-truncation";
 
   /*
   ** We patch out a very annoying 'feature' in ./configure, which
diff --git a/pkgs/development/compilers/eql/default.nix b/pkgs/development/compilers/eql/default.nix
index cb960227beb..aac61912689 100644
--- a/pkgs/development/compilers/eql/default.nix
+++ b/pkgs/development/compilers/eql/default.nix
@@ -11,7 +11,7 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ ecl qt4 xorgserver xkbcomp xkeyboard_config ];
 
-  NIX_CFLAGS_COMPILE = [ "-fPIC" ];
+  NIX_CFLAGS_COMPILE = "-fPIC";
 
   postPatch = ''
     sed -re 's@[(]in-home "gui/.command-history"[)]@(concatenate '"'"'string (ext:getenv "HOME") "/.eql-gui-command-history")@' -i gui/gui.lisp
diff --git a/pkgs/development/compilers/gerbil/build.nix b/pkgs/development/compilers/gerbil/build.nix
index b5ccbca6f7e..e2ab0976482 100644
--- a/pkgs/development/compilers/gerbil/build.nix
+++ b/pkgs/development/compilers/gerbil/build.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
   buildInputs = [ gambit rsync bash ]
     ++ buildInputs_libraries ++ buildInputs_staticLibraries;
 
-  NIX_CFLAGS_COMPILE = [ "-I${libmysqlclient}/include/mysql" "-L${libmysqlclient}/lib/mysql" ];
+  NIX_CFLAGS_COMPILE = "-I${libmysqlclient}/include/mysql -L${libmysqlclient}/lib/mysql";
 
   postPatch = ''
     echo '(define (gerbil-version-string) "v${git-version}")' > src/gerbil/runtime/gx-version.scm
diff --git a/pkgs/development/compilers/graalvm/default.nix b/pkgs/development/compilers/graalvm/default.nix
index 11a94ebcce5..438c899f516 100644
--- a/pkgs/development/compilers/graalvm/default.nix
+++ b/pkgs/development/compilers/graalvm/default.nix
@@ -242,10 +242,7 @@ in rec {
                   'method->name_and_sig_as_C_string(), p2i(method->native_function()), p2i(entry)' || exit -1
     '';
     hardeningDisable = [ "fortify" ];
-    NIX_CFLAGS_COMPILE = [
-      "-Wno-error=format-overflow" # newly detected by gcc7
-      "-Wno-error=nonnull"
-    ];
+    NIX_CFLAGS_COMPILE = "-Wno-error=format-overflow -Wno-error=nonnull";
     buildPhase = ''
       export MX_ALT_OUTPUT_ROOT=$NIX_BUILD_TOP/mxbuild
       export MX_CACHE_DIR=${makeMxCache jvmci8-mxcache}
diff --git a/pkgs/development/compilers/openjdk/11.nix b/pkgs/development/compilers/openjdk/11.nix
index e365b9b28b3..b8381feef09 100644
--- a/pkgs/development/compilers/openjdk/11.nix
+++ b/pkgs/development/compilers/openjdk/11.nix
@@ -61,13 +61,13 @@ let
 
     separateDebugInfo = true;
 
-    NIX_CFLAGS_COMPILE = [ "-Wno-error" ];
+    NIX_CFLAGS_COMPILE = "-Wno-error";
 
-    NIX_LDFLAGS = lib.optionals (!headless) [
+    NIX_LDFLAGS = toString (lib.optionals (!headless) [
       "-lfontconfig" "-lcups" "-lXinerama" "-lXrandr" "-lmagic"
     ] ++ lib.optionals (!headless && enableGnome2) [
       "-lgtk-3" "-lgio-2.0" "-lgnomevfs-2" "-lgconf-2"
-    ];
+    ]);
 
     buildFlags = [ "all" ];
 
diff --git a/pkgs/development/compilers/openjdk/openjfx/11.nix b/pkgs/development/compilers/openjdk/openjfx/11.nix
index 43fe8ed8387..c6bff396108 100644
--- a/pkgs/development/compilers/openjdk/openjfx/11.nix
+++ b/pkgs/development/compilers/openjdk/openjfx/11.nix
@@ -84,7 +84,7 @@ in makePackage {
   '';
 
   # glib-2.62 deprecations
-  NIX_CFLAGS_COMPILE = [ "-DGLIB_DISABLE_DEPRECATION_WARNINGS" ];
+  NIX_CFLAGS_COMPILE = "-DGLIB_DISABLE_DEPRECATION_WARNINGS";
 
   stripDebugList = [ "." ];