diff --git a/src/libcmd/repl.cc b/src/libcmd/repl.cc
index 3805942ce..c5a95268b 100644
--- a/src/libcmd/repl.cc
+++ b/src/libcmd/repl.cc
@@ -28,7 +28,6 @@
 #include "nix/expr/print.hh"
 #include "nix/util/ref.hh"
 #include "nix/expr/value.hh"
-#include "nix/fetchers/input-cache.hh"
 
 #include "nix/util/strings.hh"
 
@@ -459,7 +458,6 @@ ProcessLineResult NixRepl::processLine(std::string line)
 
     else if (command == ":l" || command == ":load") {
         state->resetFileCache();
-        fetchers::InputCache::getCache()->clear();
         loadFile(arg);
     }
 
@@ -469,7 +467,6 @@ ProcessLineResult NixRepl::processLine(std::string line)
 
     else if (command == ":r" || command == ":reload") {
         state->resetFileCache();
-        fetchers::InputCache::getCache()->clear();
         reloadFiles();
     }
 
diff --git a/src/libexpr/eval.cc b/src/libexpr/eval.cc
index 9d60676f5..10a33c042 100644
--- a/src/libexpr/eval.cc
+++ b/src/libexpr/eval.cc
@@ -19,6 +19,7 @@
 #include "nix/util/url.hh"
 #include "nix/fetchers/fetch-to-store.hh"
 #include "nix/fetchers/tarball.hh"
+#include "nix/fetchers/input-cache.hh"
 
 #include "parser-tab.hh"
 
@@ -310,6 +311,7 @@ EvalState::EvalState(
     )}
     , store(store)
     , buildStore(buildStore ? buildStore : store)
+    , inputCache(fetchers::InputCache::create())
     , debugRepl(nullptr)
     , debugStop(false)
     , trylevel(0)
@@ -1152,6 +1154,7 @@ void EvalState::resetFileCache()
 {
     fileEvalCache.clear();
     fileParseCache.clear();
+    inputCache->clear();
 }
 
 
diff --git a/src/libexpr/include/nix/expr/eval.hh b/src/libexpr/include/nix/expr/eval.hh
index 61da225fc..6a6959bd8 100644
--- a/src/libexpr/include/nix/expr/eval.hh
+++ b/src/libexpr/include/nix/expr/eval.hh
@@ -33,7 +33,10 @@ namespace nix {
 constexpr size_t maxPrimOpArity = 8;
 
 class Store;
-namespace fetchers { struct Settings; }
+namespace fetchers {
+struct Settings;
+struct InputCache;
+}
 struct EvalSettings;
 class EvalState;
 class StorePath;
@@ -300,6 +303,8 @@ public:
 
     RootValue vImportedDrvToDerivation = nullptr;
 
+    ref<fetchers::InputCache> inputCache;
+
     /**
      * Debugger
      */
diff --git a/src/libfetchers/include/nix/fetchers/input-cache.hh b/src/libfetchers/include/nix/fetchers/input-cache.hh
index 6a7194741..a7ca34487 100644
--- a/src/libfetchers/include/nix/fetchers/input-cache.hh
+++ b/src/libfetchers/include/nix/fetchers/input-cache.hh
@@ -25,7 +25,7 @@ struct InputCache
 
     virtual void clear() = 0;
 
-    static ref<InputCache> getCache();
+    static ref<InputCache> create();
 };
 
 }
diff --git a/src/libfetchers/input-cache.cc b/src/libfetchers/input-cache.cc
index 6772d67c7..716143899 100644
--- a/src/libfetchers/input-cache.cc
+++ b/src/libfetchers/input-cache.cc
@@ -72,10 +72,9 @@ struct InputCacheImpl : InputCache
     }
 };
 
-ref<InputCache> InputCache::getCache()
+ref<InputCache> InputCache::create()
 {
-    static auto cache = make_ref<InputCacheImpl>();
-    return cache;
+    return make_ref<InputCacheImpl>();
 }
 
 }
diff --git a/src/libflake-c/nix_api_flake.cc b/src/libflake-c/nix_api_flake.cc
index 0cc9a6a10..f100bf146 100644
--- a/src/libflake-c/nix_api_flake.cc
+++ b/src/libflake-c/nix_api_flake.cc
@@ -7,7 +7,6 @@
 #include "nix_api_fetchers.h"
 
 #include "nix/flake/flake.hh"
-#include "nix/fetchers/input-cache.hh"
 
 nix_flake_settings * nix_flake_settings_new(nix_c_context * context)
 {
@@ -178,7 +177,7 @@ nix_locked_flake * nix_flake_lock(
 {
     nix_clear_err(context);
     try {
-        nix::fetchers::InputCache::getCache()->clear();
+        eval_state->state.resetFileCache();
         auto lockedFlake = nix::make_ref<nix::flake::LockedFlake>(nix::flake::lockFlake(
             *flakeSettings->settings, eval_state->state, *flakeReference->flakeRef, *flags->lockFlags));
         return new nix_locked_flake{lockedFlake};
diff --git a/src/libflake/flake/flake.cc b/src/libflake/flake/flake.cc
index cee39defc..afeefdaec 100644
--- a/src/libflake/flake/flake.cc
+++ b/src/libflake/flake/flake.cc
@@ -341,7 +341,7 @@ static Flake getFlake(
     const InputAttrPath & lockRootAttrPath)
 {
     // Fetch a lazy tree first.
-    auto cachedInput = fetchers::InputCache::getCache()->getAccessor(state.store, originalRef.input, useRegistries);
+    auto cachedInput = state.inputCache->getAccessor(state.store, originalRef.input, useRegistries);
 
     auto resolvedRef = FlakeRef(std::move(cachedInput.resolvedInput), originalRef.subdir);
     auto lockedRef = FlakeRef(std::move(cachedInput.lockedInput), originalRef.subdir);
@@ -356,7 +356,7 @@ static Flake getFlake(
         debug("refetching input '%s' due to self attribute", newLockedRef);
         // FIXME: need to remove attrs that are invalidated by the changed input attrs, such as 'narHash'.
         newLockedRef.input.attrs.erase("narHash");
-        auto cachedInput2 = fetchers::InputCache::getCache()->getAccessor(state.store, newLockedRef.input, useRegistries);
+        auto cachedInput2 = state.inputCache->getAccessor(state.store, newLockedRef.input, useRegistries);
         cachedInput.accessor = cachedInput2.accessor;
         lockedRef = FlakeRef(std::move(cachedInput2.lockedInput), newLockedRef.subdir);
     }
@@ -717,7 +717,7 @@ LockedFlake lockFlake(
                                 if (auto resolvedPath = resolveRelativePath()) {
                                     return {*resolvedPath, *input.ref};
                                 } else {
-                                    auto cachedInput = fetchers::InputCache::getCache()->getAccessor(state.store, input.ref->input, useRegistries);
+                                    auto cachedInput = state.inputCache->getAccessor(state.store, input.ref->input, useRegistries);
 
                                     auto lockedRef = FlakeRef(std::move(cachedInput.lockedInput), input.ref->subdir);