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-rw-r--r--src/libstore/gc.cc2
-rw-r--r--src/libstore/store-api.cc8
-rw-r--r--src/libstore/store-api.hh3
3 files changed, 4 insertions, 9 deletions
diff --git a/src/libstore/gc.cc b/src/libstore/gc.cc
index 552016584af1..b5cc21de44ac 100644
--- a/src/libstore/gc.cc
+++ b/src/libstore/gc.cc
@@ -482,7 +482,7 @@ void LocalStore::gcPath(const GCOptions & options, GCResults & results,
     results.bytesFreed += bytesFreed;
     results.blocksFreed += blocksFreed;
 
-    if (results.bytesFreed > options.maxFreed) {
+    if (options.maxFreed && results.bytesFreed > options.maxFreed) {
         printMsg(lvlInfo, format("deleted more than %1% bytes; stopping") % options.maxFreed);
         throw GCLimitReached();
     }
diff --git a/src/libstore/store-api.cc b/src/libstore/store-api.cc
index e80be1e68c5a..eb75d3ada1f4 100644
--- a/src/libstore/store-api.cc
+++ b/src/libstore/store-api.cc
@@ -5,12 +5,6 @@
 #include <limits.h>
 
 
-/* Needed for some ancient environments. */
-#ifndef ULLONG_MAX
-#define ULLONG_MAX 18446744073709551615ULL
-#endif
-
-
 namespace nix {
 
 
@@ -18,7 +12,7 @@ GCOptions::GCOptions()
 {
     action = gcDeleteDead;
     ignoreLiveness = false;
-    maxFreed = ULLONG_MAX;
+    maxFreed = 0;
     maxLinks = 0;
     useAtime = false;
     maxAtime = (time_t) -1;
diff --git a/src/libstore/store-api.hh b/src/libstore/store-api.hh
index 1c6f737285d6..bac2f6b9a26c 100644
--- a/src/libstore/store-api.hh
+++ b/src/libstore/store-api.hh
@@ -56,7 +56,8 @@ struct GCOptions
     /* For `gcDeleteSpecific', the paths to delete. */
     PathSet pathsToDelete;
 
-    /* Stop after at least `maxFreed' bytes have been freed. */
+    /* Stop after at least `maxFreed' bytes have been freed.  0 means
+       no limit. */
     unsigned long long maxFreed;
 
     /* Stop after the number of hard links to the Nix store directory