diff --git a/contrib/build_qt/qt/env.source b/contrib/build_qt/qt/env.source
index 9e1681f205..dcbf21c815 100644
--- a/contrib/build_qt/qt/env.source
+++ b/contrib/build_qt/qt/env.source
@@ -19,7 +19,16 @@ else
   BIN_DIR="${BIN_DIR:-$ENV_ROOT/bin}"
 
   export LDFLAGS="-L${TARGET_DIR}/lib"
-  # FIXME: detect OS somehow
+
+if [[ $(uname) == "Darwin" ]];then
+  export OS="$(sw_vers -productName) $(sw_vers -productVersion) $(sw_vers -buildVersion)"
+  export OS_ARCHITECTURE=$(uname -m)
+  export OS_TYPE=$(uname)
+else
+  export OS=$(cat /etc/issue)
+  export OS_ARCHITECTURE=$(uname -m)
+  export OS_TYPE=$(uname -o)
+fi
   export DYLD_LIBRARY_PATH="${TARGET_DIR}/lib"
   export PKG_CONFIG_PATH="$TARGET_DIR/lib/pkgconfig"
   #export CFLAGS="-I${TARGET_DIR}/include $LDFLAGS -static-libgcc -Wl,-Bstatic -lc"