diff --git a/pkgs/applications/audio/faust/faust1.nix b/pkgs/applications/audio/faust/faust1.nix
index 20ba1c14745a..8749497c8baf 100644
--- a/pkgs/applications/audio/faust/faust1.nix
+++ b/pkgs/applications/audio/faust/faust1.nix
@@ -170,8 +170,8 @@ let
             --set FAUST_LIB_PATH "${faust}/lib/faust" \
             --prefix PATH : "$PATH" \
             --prefix PKG_CONFIG_PATH : "$PKG_CONFIG_PATH" \
-            --set NIX_CFLAGS_COMPILE "\"$NIX_CFLAGS_COMPILE\"" \
-            --set NIX_LDFLAGS "\"$NIX_LDFLAGS\""
+            --set NIX_CFLAGS_COMPILE "$NIX_CFLAGS_COMPILE" \
+            --set NIX_LDFLAGS "$NIX_LDFLAGS"
         done
       '';
     });
diff --git a/pkgs/applications/audio/faust/faust1git.nix b/pkgs/applications/audio/faust/faust1git.nix
index 02b71f6b5711..94e58f224283 100644
--- a/pkgs/applications/audio/faust/faust1git.nix
+++ b/pkgs/applications/audio/faust/faust1git.nix
@@ -175,8 +175,8 @@ let
             --set FAUSTINC "${faust}/include/faust" \
             --prefix PATH : "$PATH" \
             --prefix PKG_CONFIG_PATH : "$PKG_CONFIG_PATH" \
-            --set NIX_CFLAGS_COMPILE "\"$NIX_CFLAGS_COMPILE\"" \
-            --set NIX_LDFLAGS "\"$NIX_LDFLAGS\""
+            --set NIX_CFLAGS_COMPILE "$NIX_CFLAGS_COMPILE" \
+            --set NIX_LDFLAGS "$NIX_LDFLAGS"
         done
       '';
     });
diff --git a/pkgs/applications/audio/faust/faust2.nix b/pkgs/applications/audio/faust/faust2.nix
index 3953eb2b7e05..24cab4cdbcd1 100644
--- a/pkgs/applications/audio/faust/faust2.nix
+++ b/pkgs/applications/audio/faust/faust2.nix
@@ -196,8 +196,8 @@ let
             --set FAUST_LIB_PATH "${faust}/lib/faust" \
             --prefix PATH : "$PATH" \
             --prefix PKG_CONFIG_PATH : "$PKG_CONFIG_PATH" \
-            --set NIX_CFLAGS_COMPILE "\"$NIX_CFLAGS_COMPILE\"" \
-            --set NIX_LDFLAGS "\"$NIX_LDFLAGS\""
+            --set NIX_CFLAGS_COMPILE "$NIX_CFLAGS_COMPILE" \
+            --set NIX_LDFLAGS "$NIX_LDFLAGS"
         done
       '';
     });