5 files changed, 5 insertions, 0 deletions
diff --git a/src/download-via-ssh/download-via-ssh.cc b/src/download-via-ssh/download-via-ssh.cc
index b64455eb1724..164c24b49e26 100644
--- a/src/download-via-ssh/download-via-ssh.cc
+++ b/src/download-via-ssh/download-via-ssh.cc
@@ -9,6 +9,7 @@
 #include "store-api.hh"
 
 #include <iostream>
+#include <stdlib.h>
 #include <unistd.h>
 
 using namespace nix;
diff --git a/src/libmain/shared.cc b/src/libmain/shared.cc
index ef4ea370622b..bf5688a1e606 100644
--- a/src/libmain/shared.cc
+++ b/src/libmain/shared.cc
@@ -11,6 +11,7 @@
 #include <exception>
 #include <algorithm>
 
+#include <stdlib.h>
 #include <sys/time.h>
 #include <sys/stat.h>
 #include <unistd.h>
diff --git a/src/libstore/optimise-store.cc b/src/libstore/optimise-store.cc
index dd18d66fa008..fb5607676510 100644
--- a/src/libstore/optimise-store.cc
+++ b/src/libstore/optimise-store.cc
@@ -4,6 +4,7 @@
 #include "local-store.hh"
 #include "globals.hh"
 
+#include <stdlib.h>
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <unistd.h>
diff --git a/src/libstore/remote-store.cc b/src/libstore/remote-store.cc
index 650f177986a0..cabde051bd02 100644
--- a/src/libstore/remote-store.cc
+++ b/src/libstore/remote-store.cc
@@ -10,6 +10,7 @@
 #include <sys/stat.h>
 #include <sys/socket.h>
 #include <sys/un.h>
+#include <errno.h>
 #include <fcntl.h>
 
 #include <iostream>
diff --git a/src/libutil/monitor-fd.hh b/src/libutil/monitor-fd.hh
index 72d23fb6934c..e99869effe1a 100644
--- a/src/libutil/monitor-fd.hh
+++ b/src/libutil/monitor-fd.hh
@@ -3,6 +3,7 @@
 #include <thread>
 #include <atomic>
 
+#include <stdlib.h>
 #include <poll.h>
 #include <sys/types.h>
 #include <unistd.h>