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-rw-r--r--nixpkgs/pkgs/development/libraries/boost/generic.nix6
1 files changed, 5 insertions, 1 deletions
diff --git a/nixpkgs/pkgs/development/libraries/boost/generic.nix b/nixpkgs/pkgs/development/libraries/boost/generic.nix
index abff1268bfae..6158eb875117 100644
--- a/nixpkgs/pkgs/development/libraries/boost/generic.nix
+++ b/nixpkgs/pkgs/development/libraries/boost/generic.nix
@@ -132,7 +132,8 @@ stdenv.mkDerivation {
     license = licenses.boost;
     platforms = platforms.unix ++ platforms.windows;
     badPlatforms = optional (versionOlder version "1.59") "aarch64-linux"
-                 ++ optional ((versionOlder version "1.57") || version == "1.58") "x86_64-darwin";
+                 ++ optional ((versionOlder version "1.57") || version == "1.58") "x86_64-darwin"
+                 ++ optionals (versionOlder version "1.73") lib.platforms.riscv;
     maintainers = with maintainers; [ peti ];
   };
 
@@ -149,6 +150,9 @@ stdenv.mkDerivation {
     cat << EOF >> user-config.jam
     using gcc : cross : ${stdenv.cc.targetPrefix}c++ ;
     EOF
+    # Build b2 with buildPlatform CC/CXX.
+    sed '2i export CC=$CC_FOR_BUILD; export CXX=$CXX_FOR_BUILD' \
+      -i ./tools/build/src/engine/build.sh
   '';
 
   NIX_CFLAGS_LINK = lib.optionalString stdenv.isDarwin