diff --git a/src/libfetchers/git.cc b/src/libfetchers/git.cc
index 81c579e84..9fd8d7bbf 100644
--- a/src/libfetchers/git.cc
+++ b/src/libfetchers/git.cc
@@ -695,7 +695,7 @@ struct GitInputScheme : InputScheme
             });
             Finally const _wait([&] { proc.wait(); });
 
-            unpackTarfile(*proc.stdout(), tmpDir);
+            unpackTarfile(*proc.getStdout(), tmpDir);
         }
 
         auto storePath = store->addToStore(name, tmpDir, FileIngestionMethod::Recursive, htSHA256, filter);
diff --git a/src/libstore/build/derivation-goal.cc b/src/libstore/build/derivation-goal.cc
index 7cf8a55c9..d0152355f 100644
--- a/src/libstore/build/derivation-goal.cc
+++ b/src/libstore/build/derivation-goal.cc
@@ -932,7 +932,7 @@ void runPostBuildHook(
     Finally const _wait([&] { proc.wait(); });
 
     // FIXME just process the data, without a wrapper sink class
-    proc.stdout()->drainInto(sink);
+    proc.getStdout()->drainInto(sink);
 }
 
 void DerivationGoal::buildDone()
diff --git a/src/libutil/processes.cc b/src/libutil/processes.cc
index 4fe3dcfb4..05b1321e9 100644
--- a/src/libutil/processes.cc
+++ b/src/libutil/processes.cc
@@ -251,7 +251,7 @@ std::pair<int, std::string> runProgram(RunOptions && options)
     try {
         auto proc = runProgram2(options);
         Finally const _wait([&] { proc.wait(); });
-        stdout = proc.stdout()->drain();
+        stdout = proc.getStdout()->drain();
     } catch (ExecError & e) {
         status = e.status;
     }
diff --git a/src/libutil/processes.hh b/src/libutil/processes.hh
index f61b9696d..dc09a9ba4 100644
--- a/src/libutil/processes.hh
+++ b/src/libutil/processes.hh
@@ -106,7 +106,7 @@ public:
 
     void wait();
 
-    Source * stdout() const { return stdoutSource.get(); }
+    Source * getStdout() const { return stdoutSource.get(); };
 };
 
 std::pair<int, std::string> runProgram(RunOptions && options);