diff --git a/cmds/installd/commands.cpp b/cmds/installd/commands.cpp
index 77719bf..4fde1ee 100644
--- a/cmds/installd/commands.cpp
+++ b/cmds/installd/commands.cpp
@@ -722,7 +722,7 @@
     ALOGE("execv(%s) failed: %s\n", PATCHOAT_BIN, strerror(errno));
 }
 
-static void run_dex2oat(int zip_fd, int oat_fd, int input_vdex_fd, int output_vdex_fd, int image_fd,
+static void run_dex2oat(int zip_fd, int oat_fd, int vdex_fd, int image_fd,
         const char* input_file_name, const char* output_file_name, int swap_fd,
         const char *instruction_set, const char* compiler_filter, bool vm_safe_mode,
         bool debuggable, bool post_bootcomplete, int profile_fd, const char* shared_libraries) {
@@ -806,8 +806,7 @@
 
     char zip_fd_arg[strlen("--zip-fd=") + MAX_INT_LEN];
     char zip_location_arg[strlen("--zip-location=") + PKG_PATH_MAX];
-    char input_vdex_fd_arg[strlen("--input-vdex-fd=") + MAX_INT_LEN];
-    char output_vdex_fd_arg[strlen("--output-vdex-fd=") + MAX_INT_LEN];
+    char vdex_fd_arg[strlen("--vdex-fd=") + MAX_INT_LEN];
     char oat_fd_arg[strlen("--oat-fd=") + MAX_INT_LEN];
     char oat_location_arg[strlen("--oat-location=") + PKG_PATH_MAX];
     char instruction_set_arg[strlen("--instruction-set=") + MAX_INSTRUCTION_SET_LEN];
@@ -823,8 +822,7 @@
 
     sprintf(zip_fd_arg, "--zip-fd=%d", zip_fd);
     sprintf(zip_location_arg, "--zip-location=%s", input_file_name);
-    sprintf(input_vdex_fd_arg, "--input-vdex-fd=%d", input_vdex_fd);
-    sprintf(output_vdex_fd_arg, "--output-vdex-fd=%d", output_vdex_fd);
+    sprintf(vdex_fd_arg, "--vdex-fd=%d", vdex_fd);
     sprintf(oat_fd_arg, "--oat-fd=%d", oat_fd);
     sprintf(oat_location_arg, "--oat-location=%s", output_file_name);
     sprintf(instruction_set_arg, "--instruction-set=%s", instruction_set);
@@ -887,7 +885,7 @@
 
     ALOGV("Running %s in=%s out=%s\n", DEX2OAT_BIN, input_file_name, output_file_name);
 
-    const char* argv[9  // program name, mandatory arguments and the final NULL
+    const char* argv[8  // program name, mandatory arguments and the final NULL
                      + (have_dex2oat_isa_variant ? 1 : 0)
                      + (have_dex2oat_isa_features ? 1 : 0)
                      + (have_dex2oat_Xms_flag ? 2 : 0)
@@ -908,8 +906,7 @@
     argv[i++] = DEX2OAT_BIN;
     argv[i++] = zip_fd_arg;
     argv[i++] = zip_location_arg;
-    argv[i++] = input_vdex_fd_arg;
-    argv[i++] = output_vdex_fd_arg;
+    argv[i++] = vdex_fd_arg;
     argv[i++] = oat_fd_arg;
     argv[i++] = oat_location_arg;
     argv[i++] = instruction_set_arg;
@@ -1637,17 +1634,17 @@
         return -1;
     }
 
-    // Open the existing VDEX associated with the OAT.
-    base::unique_fd in_vdex_fd;
-    std::string in_vdex_path_str = create_vdex_filename(input_file);
-    if (in_vdex_path_str.empty()) {
-        ALOGE("installd cannot compute input vdex location for '%s'\n", input_file);
-        return -1;
-    }
-    in_vdex_fd.reset(open(in_vdex_path_str.c_str(), O_RDONLY, 0));
-    if (in_vdex_fd.get() < 0) {
-        if (dexopt_needed == DEXOPT_PATCHOAT_NEEDED
-            || dexopt_needed == DEXOPT_SELF_PATCHOAT_NEEDED) {
+    // If invoking patchoat, open the VDEX associated with the OAT too.
+    std::string in_vdex_path_str;
+    base::unique_fd input_vdex_fd;
+    if (dexopt_needed == DEXOPT_PATCHOAT_NEEDED
+        || dexopt_needed == DEXOPT_SELF_PATCHOAT_NEEDED) {
+        in_vdex_path_str = create_vdex_filename(input_file);
+        if (in_vdex_path_str.empty()) {
+            return -1;
+        }
+        input_vdex_fd.reset(open(in_vdex_path_str.c_str(), O_RDONLY, 0));
+        if (input_vdex_fd.get() < 0) {
             ALOGE("installd cannot open '%s' for input during dexopt\n", in_vdex_path_str.c_str());
             return -1;
         }
@@ -1760,7 +1757,7 @@
         if (dexopt_needed == DEXOPT_PATCHOAT_NEEDED
             || dexopt_needed == DEXOPT_SELF_PATCHOAT_NEEDED) {
             run_patchoat(input_fd.get(),
-                         in_vdex_fd.get(),
+                         input_vdex_fd.get(),
                          out_oat_fd.get(),
                          out_vdex_fd.get(),
                          input_file,
@@ -1774,7 +1771,6 @@
             const char *input_file_name = get_location_from_path(input_file);
             run_dex2oat(input_fd.get(),
                         out_oat_fd.get(),
-                        in_vdex_fd.get(),
                         out_vdex_fd.get(),
                         image_fd.get(),
                         input_file_name,