4 files changed, 12 insertions, 6 deletions
diff --git a/third_party/nix/src/nix/doctor.cc b/third_party/nix/src/nix/doctor.cc
index 97c31d0376f1..0105b05e97fc 100644
--- a/third_party/nix/src/nix/doctor.cc
+++ b/third_party/nix/src/nix/doctor.cc
@@ -48,7 +48,8 @@ struct CmdDoctor final : StoreCommand {
   static bool checkNixInPath() {
     PathSet dirs;
 
-    for (auto& dir : absl::StrSplit(getEnv("PATH"), absl::ByChar(':'))) {
+    for (auto& dir :
+         absl::StrSplit(getEnv("PATH"), absl::ByChar(':'), absl::SkipEmpty())) {
       if (pathExists(absl::StrCat(dir, "/nix-env"))) {
         dirs.insert(dirOf(canonPath(absl::StrCat(dir, "/nix-env"), true)));
       }
@@ -71,7 +72,8 @@ struct CmdDoctor final : StoreCommand {
   static bool checkProfileRoots(const ref<Store>& store) {
     PathSet dirs;
 
-    for (auto dir : absl::StrSplit(getEnv("PATH"), absl::ByChar(':'))) {
+    for (auto dir :
+         absl::StrSplit(getEnv("PATH"), absl::ByChar(':'), absl::SkipEmpty())) {
       Path profileDir = dirOf(dir);
       try {
         Path userEnv = canonPath(profileDir, true);
diff --git a/third_party/nix/src/nix/edit.cc b/third_party/nix/src/nix/edit.cc
index 958e8aec49cc..a18cba292e00 100644
--- a/third_party/nix/src/nix/edit.cc
+++ b/third_party/nix/src/nix/edit.cc
@@ -55,7 +55,8 @@ struct CmdEdit final : InstallableCommand {
 
     auto editor = getEnv("EDITOR", "cat");
 
-    Strings args = absl::StrSplit(editor, absl::ByAnyChar(" \t\n\r"));
+    Strings args =
+        absl::StrSplit(editor, absl::ByAnyChar(" \t\n\r"), absl::SkipEmpty());
 
     if (editor.find("emacs") != std::string::npos ||
         editor.find("nano") != std::string::npos ||
diff --git a/third_party/nix/src/nix/run.cc b/third_party/nix/src/nix/run.cc
index 241e0a2d7855..e76f8834cfc8 100644
--- a/third_party/nix/src/nix/run.cc
+++ b/third_party/nix/src/nix/run.cc
@@ -123,7 +123,8 @@ struct CmdRun final : InstallablesCommand {
       todo.push(path);
     }
 
-    Strings unixPath = absl::StrSplit(getEnv("PATH"), absl::ByChar(':'));
+    Strings unixPath =
+        absl::StrSplit(getEnv("PATH"), absl::ByChar(':'), absl::SkipEmpty());
 
     while (!todo.empty()) {
       Path path = todo.front();
@@ -137,7 +138,8 @@ struct CmdRun final : InstallablesCommand {
       auto propPath = path + "/nix-support/propagated-user-env-packages";
       if (accessor->stat(propPath).type == FSAccessor::tRegular) {
         for (auto p :
-             absl::StrSplit(readFile(propPath), absl::ByAnyChar(" \t\n\r"))) {
+             absl::StrSplit(readFile(propPath), absl::ByAnyChar(" \t\n\r"),
+                            absl::SkipEmpty())) {
           todo.push(std::string(p));
         }
       }
diff --git a/third_party/nix/src/nix/upgrade-nix.cc b/third_party/nix/src/nix/upgrade-nix.cc
index 3e3b55789df9..158e3cd1c2f8 100644
--- a/third_party/nix/src/nix/upgrade-nix.cc
+++ b/third_party/nix/src/nix/upgrade-nix.cc
@@ -103,7 +103,8 @@ struct CmdUpgradeNix final : MixDryRun, StoreCommand {
   static Path getProfileDir(const ref<Store>& store) {
     Path where;
 
-    for (auto& dir : absl::StrSplit(getEnv("PATH"), absl::ByChar(':'))) {
+    for (auto& dir :
+         absl::StrSplit(getEnv("PATH"), absl::ByChar(':'), absl::SkipEmpty())) {
       if (pathExists(absl::StrCat(dir, "/nix-env"))) {
         where = dir;
         break;