diff --git a/src/libexpr/c/local.mk b/src/libexpr/c/local.mk
index d2f01c0a9..01b03f4d2 100644
--- a/src/libexpr/c/local.mk
+++ b/src/libexpr/c/local.mk
@@ -9,7 +9,7 @@ libexprc_SOURCES := \
 
 libexprc_CXXFLAGS += -I src/libutil -Isrc/libfetchers -I src/libstore -I src/libstorec -I src/libexpr -I src/libutil/c -I src/libstore/c
 
-libexprc_LIBS = libutil libutilc libstorec libexpr
+libexprc_LIBS = libutil libutilc libstore libstorec libexpr
 
 libexprc_LDFLAGS += -pthread
 
diff --git a/src/libstore/c/nix_api_store.cc b/src/libstore/c/nix_api_store.cc
index 4ee97c8a1..496b20534 100644
--- a/src/libstore/c/nix_api_store.cc
+++ b/src/libstore/c/nix_api_store.cc
@@ -3,6 +3,7 @@
 #include "nix_api_util.h"
 #include "nix_api_util_internal.h"
 
+#include "path.hh"
 #include "store-api.hh"
 
 #include "globals.hh"
@@ -118,7 +119,7 @@ nix_err nix_store_build(
     try {
         store->ptr->buildPaths({
             nix::DerivedPath::Built{
-                .drvPath = path->path,
+                .drvPath = nix::makeConstantStorePathRef(path->path),
                 .outputs = nix::OutputsSpec::All{},
             },
         });