1 files changed, 4 insertions, 2 deletions

diff --git a/nix/local.mk b/nix/local.mk
index 54976a5741a..9f21550af2d 100644
--- a/nix/local.mk
+++ b/nix/local.mk
@@ -56,7 +56,8 @@ libutil_a_SOURCES =				\
   %D%/libutil/affinity.cc                       \
   %D%/libutil/serialise.cc                      \
   %D%/libutil/util.cc                           \
-  %D%/libutil/hash.cc
+  %D%/libutil/hash.cc                           \
+  %D%/libutil/spawn.cc
 
 libutil_headers =                               \
   %D%/libutil/affinity.hh                       \
@@ -64,7 +65,8 @@ libutil_headers =				\
   %D%/libutil/serialise.hh                      \
   %D%/libutil/util.hh                           \
   %D%/libutil/archive.hh                        \
-  %D%/libutil/types.hh
+  %D%/libutil/types.hh                          \
+  %D%/libutil/spawn.hh
 
 libutil_a_CPPFLAGS =                            \
   -I$(top_builddir)/nix                         \