<nix/fetchurl.nix>: Support xz-compressed NARs

1 files changed, 3 insertions, 0 deletions

diff --git a/src/libstore/builtins.cc b/src/libstore/builtins.cc
index fefad63bd1bb..a1c4b48bf62e 100644
--- a/src/libstore/builtins.cc
+++ b/src/libstore/builtins.cc
@@ -2,6 +2,7 @@
 #include "download.hh"
 #include "store-api.hh"
 #include "archive.hh"
+#include "compression.hh"
 
 namespace nix {
 
@@ -28,6 +29,8 @@ void builtinFetchurl(const BasicDerivation & drv)
 
     auto unpack = drv.env.find("unpack");
     if (unpack != drv.env.end() && unpack->second == "1") {
+        if (string(data.data, 0, 6) == string("\xfd" "7zXZ\0", 6))
+            data.data = decompressXZ(data.data);
         StringSource source(data.data);
         restorePath(storePath, source);
     } else