diff --git a/src/libgit2/streams/socket.c b/src/libgit2/streams/socket.c
index a463312..f8f2340 100644
--- a/src/libgit2/streams/socket.c
+++ b/src/libgit2/streams/socket.c
@@ -12,6 +12,25 @@
 #include "runtime.h"
 #include "stream.h"
 
+#if defined(__wasi__)
+/* No sockets in WASI: only local transports work. */
+int git_socket_stream__connect_timeout = 0;
+int git_socket_stream__timeout = 0;
+
+int git_socket_stream_new(git_stream **out, const char *host, const char *port)
+{
+	GIT_UNUSED(out);
+	GIT_UNUSED(host);
+	GIT_UNUSED(port);
+	git_error_set(GIT_ERROR_NET, "there is no socket stream available");
+	return -1;
+}
+
+int git_socket_stream_global_init(void)
+{
+	return 0;
+}
+#else
 #ifndef _WIN32
 # include <sys/types.h>
 # include <sys/socket.h>
@@ -426,3 +445,4 @@ int git_socket_stream_global_init(void)
 }
 
  #endif
+#endif
diff --git a/src/libgit2/sysdir.c b/src/libgit2/sysdir.c
index 7838a67..81c17c8 100644
--- a/src/libgit2/sysdir.c
+++ b/src/libgit2/sysdir.c
@@ -17,7 +17,9 @@
 # include "win32/utf-conv.h"
 #else
 # include <unistd.h>
-# include <pwd.h>
+# ifndef __wasi__
+#  include <pwd.h>
+# endif
 #endif
 
 #ifdef GIT_WIN32
@@ -283,7 +285,17 @@ static int git_sysdir_guess_system_dirs(git_str *out)
 #endif
 }
 
-#ifndef GIT_WIN32
+#if defined(__wasi__)
+/* WASI has no users: HOME is all there is. */
+# define getuid() 0
+# define geteuid() 0
+static int get_passwd_home(git_str *out, uid_t uid)
+{
+	GIT_UNUSED(out);
+	GIT_UNUSED(uid);
+	return GIT_ENOTFOUND;
+}
+#elif !defined(GIT_WIN32)
 static int get_passwd_home(git_str *out, uid_t uid)
 {
 	struct passwd pwd, *pwdptr;
diff --git a/src/util/unix/process.c b/src/util/unix/process.c
index a1a2cf1..b404796 100644
--- a/src/util/unix/process.c
+++ b/src/util/unix/process.c
@@ -5,6 +5,7 @@
  * a Linking Exception. For full terms see the included COPYING file.
  */
 
+#ifndef __wasi__
 #include <stdio.h>
 #include <sys/wait.h>
 #include <signal.h>
@@ -627,3 +628,4 @@ void git_process_free(git_process *process)
 	git_strlist_free_with_null(process->env);
 	git__free(process);
 }
+#endif