3 files changed, 12 insertions, 10 deletions
diff --git a/src/libstore/build.cc b/src/libstore/build.cc
index 2d81f72c12ab..50c59c1314d9 100644
--- a/src/libstore/build.cc
+++ b/src/libstore/build.cc
@@ -20,6 +20,7 @@
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <sys/utsname.h>
+#include <sys/select.h>
 #include <fcntl.h>
 #include <unistd.h>
 #include <errno.h>
diff --git a/src/libstore/local-store.cc b/src/libstore/local-store.cc
index 91149b30f742..1dcd7228f347 100644
--- a/src/libstore/local-store.cc
+++ b/src/libstore/local-store.cc
@@ -13,6 +13,7 @@
 
 #include <sys/types.h>
 #include <sys/stat.h>
+#include <sys/select.h>
 #include <sys/time.h>
 #include <unistd.h>
 #include <utime.h>
diff --git a/src/libutil/util.cc b/src/libutil/util.cc
index ab0a3b303076..5cda9a0677b5 100644
--- a/src/libutil/util.cc
+++ b/src/libutil/util.cc
@@ -942,16 +942,16 @@ string runProgram(Path program, bool searchPath, const Strings & args,
     checkInterrupt();
 
     /* Create a pipe. */
-    Pipe stdout, stdin;
-    stdout.create();
-    if (!input.empty()) stdin.create();
+    Pipe out, in;
+    out.create();
+    if (!input.empty()) in.create();
 
     /* Fork. */
     Pid pid = startProcess([&]() {
-        if (dup2(stdout.writeSide, STDOUT_FILENO) == -1)
+        if (dup2(out.writeSide, STDOUT_FILENO) == -1)
             throw SysError("dupping stdout");
         if (!input.empty()) {
-            if (dup2(stdin.readSide, STDIN_FILENO) == -1)
+            if (dup2(in.readSide, STDIN_FILENO) == -1)
                 throw SysError("dupping stdin");
         }
 
@@ -967,16 +967,16 @@ string runProgram(Path program, bool searchPath, const Strings & args,
         throw SysError(format("executing ‘%1%’") % program);
     });
 
-    stdout.writeSide.close();
+    out.writeSide.close();
 
     /* FIXME: This can deadlock if the input is too long. */
     if (!input.empty()) {
-        stdin.readSide.close();
-        writeFull(stdin.writeSide, input);
-        stdin.writeSide.close();
+        in.readSide.close();
+        writeFull(in.writeSide, input);
+        in.writeSide.close();
     }
 
-    string result = drainFD(stdout.readSide);
+    string result = drainFD(out.readSide);
 
     /* Wait for the child to finish. */
     int status = pid.wait(true);