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-rw-r--r--pkgs/development/libraries/boehm-gc/default.nix2
1 files changed, 1 insertions, 1 deletions
diff --git a/pkgs/development/libraries/boehm-gc/default.nix b/pkgs/development/libraries/boehm-gc/default.nix
index 399581400a0c..d6f7b46079f6 100644
--- a/pkgs/development/libraries/boehm-gc/default.nix
+++ b/pkgs/development/libraries/boehm-gc/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
   separateDebugInfo = stdenv.isLinux;
 
   preConfigure = stdenv.lib.optionalString (stdenv.hostPlatform.libc == "musl") ''
-    export NIX_CFLAGS_COMPILE+="-D_GNU_SOURCE -DUSE_MMAP -DHAVE_DL_ITERATE_PHDR"
+    export NIX_CFLAGS_COMPILE+=" -D_GNU_SOURCE -DUSE_MMAP -DHAVE_DL_ITERATE_PHDR"
   '';
 
   patches =